Lally Family History
Lally Surname Meaning
Irish: shortened form of Mullally. In some cases possibly also French: habitational name with fused definite article l' from either of two places called Ally (Cantal Haute-Loire).
Alternatively a variant of Laly a habitational name from a place so named (e.g. in Loire).
Compare Lalley.
Source: Dictionary of American Family Names 2nd edition, 2022
