Parent’s name

Dillon surname meaning

An Irish and Anglo-Norman surname from Dillon or related personal-name traditions, including Irish Ó Díollúin.

Confidence: Likely
US frequency: Rank 698 · 47,767 people
Common variants: Dillon, Dillane, Dillen, Dilon

Confidence: Likely. The main story is well supported; some details of the deeper root are less certain.

The short story

Dillon is strongly associated with the Anglo-Norman family that came to Ireland, while Irish surname traditions also connect it with Ó Díollúin and related forms. The deeper personal-name history is not uniform across all records, and Dillane or Dillen may represent separate regional developments rather than simple spelling changes. Parent’s name is the catalog category because the principal explanations run through inherited personal names and descendant forms. Likely confidence reflects the surname’s documented Irish presence without claiming one origin for every Dillon family.

Also seen as: Dillon, Dillane, Dillen, Dilon

Sources used

Ancestry, Dictionary of American Family Names entry 'Dillon' (Irish and Anglo-Norman personal-name routes)
IrishCentral surname guide 'Dillon' (Anglo-Norman and Irish history)
Names2020_LastNames_RaceHispanic_Top1000.xlsx (2020 Census)