Dinan Family History
Dinan Name Meaning
Irish (now mainly counties Clare and Cork): shortened Anglicized form of Gaelic Ó Daghnáin ‘descendant of Daghnán’ possibly a diminutive of dagh ‘good’. Irish: variant of Dineen . French: habitational name from Dinan in Côtes-d'Armor Brittany. This surname is very rare in France.
Source: Dictionary of American Family Names 2nd edition, 2022