Location: Bailiwick of Guernsey, Channel Islands, Dependency of the British Crown
Surnames/tags: Haviland de_Havilland Heavilin
Also See: Havilland - de Havilland Bookmarks
This One Name Study provides helpful information for WikiTree collaborators who are working on the Haviland & de Havilland genealogies as they relate to several distinct families:
1) The The Guernsey Family (relatives of Thomas de Haveilland the Jurat of 1470, which include most people bearing the present-day name of de Havilland or Haviland)
2) The Irish family (potentially descendants of the original spelling of Havlin which may now use the spelling Haviland)
3) The German family (potentially descendants of the original spelling of Haverland which may now use the spelling Haverland or Haviland)
One Name Studies identify matching profiles by the Last Name At Birth (LNAB), regardless of their genealogical relationship. As the name has been shared across the above three unrelated families (at least), each with variant spellings that sometimes match one another (especially "Haviland"), profiles on WIkiTree might use any of these variants as the LNAB. Profiles will thus appear on different lists even if they are related, and on the same lists even if they are not.
There are two other surname fields in the WikiTree profiles:
- The Current Last Name field is intended to represent a surname that has changed since birth, mostly usable by wives.
- The Other Last Name(s) field is for additional surnames, which we can use for the variants. This will help to merge profiles of different surnames into the same lists. However it does not help to separate profiles who belong to different families, a challenge that does not yet have a solution.
We would like to try to establish a fairly consistent template and narrative format for the Haviland & de Havilland biographies, and work together on providing Primary Sources (census records, birth records, death records, grave stones, muster lists, Visa applications, etc.) on every possible profile, and supplement those with Secondary Sources (published books, unpublished manuscripts, letters, diaries, etc). We'd like to discourage Tertiary Sources (web sites such as Ancestry.com or FindAGrave or Wikipedia, GEDCOMs, etc) as the only source in a profile. They should only be considered as supplementary to Primary and Secondary Sources whenever that is possible, and even then shouldn't be necessary. During ongoing research, sometimes the Tertiary Sources are helpful in providing a breadcrumb trail back to stronger source materials.
About the Surname
There are several myths regarding the origins of the name Haviland. One is that the name was originally de Havery, and became "Haverland" as a result of placing the family's origins in the "land of Havery." That is: the family of Havery-land, or, de Haverland. This might be a myth that arrived with the German family, but it is often confused with the Guernsey / Neustrian family.
The early Havilands of England were of French birth, the original name being de Havery. The earliest records state that three brothers of that name emigrated from France to England. While crossing the Channel it was agreed that the first to see land should say, "Have I Land" and that became their English surname." 
Unfortunately, the author did not cite the source of these "earliest records," and the above statement is probably fiction. While it is possible that the name Haverland migrated down from Germany with the Franks who settled the area (the Haverland name can still be found in Germany, as with Haverland Pumpernickel bread that has been sold there for many generations), there is no evidence that the Haverland families and the de Havilland familes are the same. On the contrary: Y-DNA research has proven so far that Germanic Haverlands and Guernsey de Havillands are not related in any way that establish an etymological connection between the two names.
Therefore, it is no longer appropriate to say that the Guernsey "de Havilland" family was originally called Haverland in Neustria, as popularized by the author of the Chronicle de Havilland in the 1890's. It is more correct to say that the Guernsey "de Havilland" family was originally called Abilant in Neustria, and if the Haverlands from Germany arrived there at some point in history, it was a distinct and unrelated genealogy. The Neustrian fief (with its castle) was not Haverland, it was Abilant. (See The Quest for Abilant.)
In sum: the spelling "Haverland" as associated with the Guernsey family is an antiquated substitution.
What makes genealogy more confusing is that ancient surnames did not have specific spellings. In the middle ages names were written down phonetically, and except for family tradition, which was subjective, internal, and required literacy, there was no "official" spelling of the name. A record-keeper who heard the name did not presume to ask how to spell it, nor did the subject, if he was present, presume to "correct" it. The record-keeper spelled the name out the way it sounded. So ancient records combine related and unrelated families with variations of Abilant, Abillant, Avilant, Avillant, Havilant, Havillant, Haverlain, Haverland, Havelin, Haverlant, Havelan, Havellande, Haberland, Haveilland, Havilland, and so forth.
The Guernsey Family is the most established carrier of the name. Not much is known about the Irish and German families, and so more research and study is needed. 
- Also see The Haviland - de Havilland Heritage Society page on WikiTree.
- Also see The Haviland - de Havilland Y-DNA Study page on WikiTree.
WikiTree Profile URLs
You will find it helpful to learn how WikiTree references profiles in their URLs. Every WikiTree profiles starts with "https://www.wikitree.com/wiki/". After that, every profile is given the syntax "[Surname]-[Sequence]". So for example, my profile is Haviland-425 because my surname is Haviland and I was the 425th profile with that surname to be created.
You can see your own profile very easily by clicking on the "My WikiTree" menu and selecting "My Profile."
So when communicating with each other about profiles, you don't need to paste the entire URL, just use "Haviland-###" with whatever the number is.
If you want to interlink profiles in WikiTree - creating an automatic hyperlink - use the syntax " Whatever-you-want-to-call-the-link". Don't forget the pipe "|" or it will break! That double bracket "[[ ]]" is used for internal profile linking. It is not used for external URL linking. For that you would use single brackets and no pipe, like this: "The Haviland - de Havilland Heritage Society".
Helpful Haviland Features in WikiTree
- If you have taken a DNA test from Family Tree DNA, Ancestry DNA, or 23AndMe, WikiTree gives you a way to interconnect with your kits so that it can compare your results with other connected individuals in the family tree! When it does this, you will find a link to your profile all over WikiTree, from every person you are related to. (This creates traffic to your profile - so if you have interconnected your DNA kits make sure your profiles look great! Otherwise it's like inviting people to your house without getting out of your pajamas.)
- There are three kinds of DNA tests that WikiTree automates in this way, and each of these tests has different levels of power (depending on how many markers are tested), and so they have limitations as to how many generations back the engine can compare with other WikiTree users. The three major tests are: Y-Chromosome Tests (aka Y-DNA tests, used in surname studies), Mitochondrial DNA Tests (aka mtDNA tests, used in maternal lineage tracking), and Autosomal DNA Tests (aka atDNA tests, used for showing relationships out to five generations across all chromosomes (except the sex chromosomes). You can dig into more about these on WikiTree here.
- 'To enter your personal DNA suite, click on the "My WikiTree" menu at the top of your screen and select "DNA Confirmation." It gives you a huge report on your DNA interconnectivity within WikiTree! Don't forget to explore all five buttons at the top of this screen: DNA Ancestors, DNA Descendants, DNA Tests, DNA Confirmation and Surnames.
- DNA Tags in Haviland / de Havilland Profiles
- After you have entered your Haviland kit numbers, the next morning you will start to see your link appear in profiles throughout WikiTree. These can be seen in the upper right hand side of the profile under "DNA Connections," along with other matches. In the case of Y-DNA tests, these will all be males with profiles on WikiTree whose profiles are interlinked.
- The next step is to add a DNA Source to each profile in your ancestry back to the earliest SHARED ancestor with the other individuals in that list. To find that shared ancestor, go to the Relationship Finder and enter the Profile IDs for you and the other person. (It's easy to find their profile ID by going to their profile and copying the last part of their profile's URL, such as in the form Haviland-###.)
- When the relationship finder builds the table of relationships, use the drop-down menu on the right to choose a Haviland or de Havilland MRCA (most recent common ancestor). That will represent your presumed Y-DNA relationship.
- Take note of who that MRCA profile is. You will be editing your entire paternal ancestry of profiles all the way up to that person.
- Starting with your profile, go into Edit mode and do two things: 1) On the upper right side, in the Edit Family section, click the radio button "father is confirmed with DNA." 2) in the profile data window, under == Sources ==, add the following (excluding the quotation marks):
- Paternal relationship is confirmed through Y-chromosome DNA testing. [[Haviland-### | Your Name]] and [[Haviland-### | Cousin’s Name]] match on ## out of ## markers (see YSearch IDs ABCDE and WXYZ) thereby confirming their direct paternal lines back to their MRCA [[Haviland-## | MRCA Name]]"
- Of course you have to replace the italics with the profile IDs, the names of the persons, and their YSearch IDs.
- Do both steps all the way to the MRCA, but do not do step 1 on the MRCA, only step 2. The reason is because you cannot genetically confirm the father of the MRCA, only your paternal descent with a cousin.
Using the Haviland and deHavilland Tags
- And so on.
- You can do this with other variants of the name, such as de Havelland, Heavilin, Heavilon, Heavirland, Haverland, Havlin, Abilant, etc.
Helpful WikiTree Usage Resources
- How to Use WikiTree
- WikiTree G2G Forum
- Name Fields
- Name Fields for European Aristocrats
- Editing Tips
- Recommended Tags
- DNA Tests
- Category Search
- Source Pages
- Family Genealogies
- Unsourced Profiles
- Creating a Template
- Unverified Father Template
- Unverified Mother Template
- Free-Space Profiles
- Free-Space Profile Search
- WikiTree's DNA Project
- Mayflower Descendants on WikiTree Interest Group
- Mentors Project
- Quakers Project
- Rangers Project
- About WikiTree Leaders
- Login to request to the join the Trusted List so that you can edit and add images.
- Private Messages: Contact the Profile Managers privately: One Name Studies WikiTree and Christopher Haviland. (Best when privacy is an issue.)
- Public Comments: Login to post. (Best for messages specifically directed to those editing this profile. Limit 20 per day.)
- Public Q&A: These will appear above and in the Genealogist-to-Genealogist (G2G) Forum. (Best for anything directed to the wider genealogy community.)