Hamilton Society (HNGS)
- Devoted to assembling and preserving historical materials pertaining to the name and its varients, Hamelton, Hamleton, Hambleton and Hambelton. Membership is open to all.
- http://www.hamiltongensociety.org/

Hamilton Kin
- Kinship of David Hughes including ancestors and associated branches.
- http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?db=hadghughes2

Hamilton-Gilbert Family
- Ancestral index as maintained by Julie Ann (Hamilton) Gilbert.
- http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?db=winterjewelbelle

Hamilton, Stockbridge, Elwell and Others
- Ward Andrew Hamilton's family history.
- http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?db=whamilton2872

Hamilton, LeVan, Juless and Moyer
- Ancestors and related lineages of Zachary Hamilton.
- http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?db=:2707620

Hamilton-Hunter-Kearse Family
- Ancestors and related lineages of Dolores Hamilton.
- http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?db=:1005743

Hamilton and Allied Family Lines
- Ancestral database as compiled by Kelley Hamilton.
- http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?db=hamilton_kelley