A merge has been proposed of duplicate profiles of Queen Victoria. I have set these as an unmerged match until a definitive version of the spelling of the surname is decided on.
Hanover (one N) is how this Royal House is spelled in Great Britain, where Victoria was Queen. All references to the monarchs of this House are spelled Hanover, as are the places named after them in Great Britain and the then Colonies. The London Gazette (the official organ of the British Government from 1665 to the present day) announced Queen Anne's death in the 3 August 1714 edition and that the succession was settled on "the most illustrious House of Hanover".
Hannover (two Ns) is how the city in Germany is spelled. And although the British Royal House came from the Electors of Hannover, this two-N spelling didn't continue when they came to be monarchs of Great Britain.
People looking for the monarchs of Great Britain from 1714 to 1901 on WikiTree will be looking for a surname of Hanover.
The WT search engine does not pick up the two-N Hannover version unless the one-N version is given as an alternate spelling in the Other Last Names field (and vice versa). Hence a person looking for Queen Victoria (Hannover-14) will not find her with a search for Hanover.
It's also untidy and inconsistent having half the British branch of the family spelled one way and half the other.
The England Project would prefer to standardise the name to Hanover but we are up for a discussion why the Hannover version should be retained for the Royal House of Great Britain.
I note that there was a sidenote in another discussion in 2017 about this (see final comment), but nothing was decided at that time.
Jo, England Project Managed Profiles team coordinator
Edit: exchanged Royalty tag with Germany tag (had reached limit)