Spelling variations of this family name include: Adam, Adame, Adan, Addam, Addame, Addan, Adane, Addane, D'Adam, D'Adame, D'Adan, D'Addam, D'Addame, D'Addan, D'Adane, D'Addane, Adant, Adante, Adent, Adans, Adan, Adent, Aden, Adens, Addant, Addante, Addent, Addans, Addan, Addent, Adden, Addens, Adente and many more.

First found in Languedoc, where the family was seated from ancient times.

Some of the first settlers of this family name or some of its variants were: Caspar Adam settled in Philadelphia in 1773; Carel Adam settled in Philadelphia in 1739; George Adam settled in New Orleans in 1820; Jean Adam settled in New York in 1774.