Holland
- Y-testing of Holland males to assist in clarifying specific ancestral lines. Both 12 and 25 marker testing kits are available. Current results are available for review.
- http://www.hollandfamily.us/DNA/

Holland, Humphreys, Layzell and Day Family
- Family history of Gary E Holland of Stevenage, Herts, ENG. Surnames include Layzell, Day, Laysol and Holland.
- http://familytreemaker.genealogy.com/users/h/o/l/Gary-E-Holland/

Holland/Mungle/Rutledge/Scott
- Family history and photographs as compiled by Pat Freyaldenhoven.
- http://www.tribalpages.com/tribes/patfrey

Holland Family: Beyond the Blue Mountains
- Descendants of Hezekiah Cranfill, Blassongame Jonathan Stone, Benjamin Holland, Zacharia Kirkland and Joseph McCormack as compiled by Patsy J Holland from Arkansas, USA.
- http://familytreemaker.genealogy.com/users/h/o/l/Patsy-J-Holland/

Holland Family History and Tree
- Ancestors and descendants of James (Jimmie) Holland and Jerutha (Ruthie) White from NC, USA. Includes links to DNA project, mailing list, forum and associated links.
- http://www.hollandfamily.us/

Holland and Mills Families
- Family trees including surnames Woodward and Burkholder.
- http://homepages.rootsweb.com/~mhmills/