Mary Alden, was born at Duxbury, Plymouth Colony before 1650. She was the daughter of Alden-63 and Priscilla Mullins Alden. She died after June 13, 1688.  No record has been found proving that Mary Alden ever married. Rebecca Alden not Mary Alden married Thomas Delano.
Source: Woodworth-Barnes, Esther Littleford and Williams, Alicia Crane, Mayflower Families through Five Generations, Vol 16 Part 1 of 3, John Alden, Boston, Mass.: General Society of Mayflower Descendants, 2002.
Source: Ancestral File, The Church of Jesus Christ of Latter-day Saints, Ancestral File (R), Copyright (c) 1987, June 1998, data as of 5 January 1998. Repository: Family History Library, 35 N West Temple Street, Salt Lake City, Utah 84150 USA, Ancestral File Number:
Source: Ancestry Family Trees, Online publication - Provo, UT, USA: Ancestry.com. Original data: Family Tree files submitted by Ancestry members. Note: This information comes from 1 or more individual Ancestry Family Tree files. This source citation points you to a current version of those files. Note: The owners of these tree files may have removed or Name: Ancestry.com Address: http://www.Ancestry.com
Source: Title: World Family Tree, Volume 1, pre-1600 to present, Repository: Fitzpatrick Home Library, WFT Family #3567
Source: Title: U.S. and International Marriage Records, 1560-1900 Author: Yates Publishing Publication: Online publication - Provo, UT, USA: Ancestry.com Operations Inc, 2004.Original data - This unique collection of records was extracted from a variety of sources including family group sheets and electronic databases. Originally, the information was derived.