Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
COSTELLO
There are approximately 10,815 people named Costello in the UK. That makes it the 977th most common surname overall. Out of every million people in the UK, approximately 171 are named Costello.
Region of origin
British Isles
Country of origin
Ireland
Language of origin
Gaelic
Religion of origin
Christian
Classification
Celtic
Related and similar surnames
CostelloeCastello
Castiello
Castelloe
Castellow
Castelo
Castell
Castellon
Castelow
Castel
Castella
Castelli
Castells
Costellow
Casteallo
Casteillo
Castellou
Casstello
Castelllo
Casteelo
Castallo
Castelou
Castealo
Casteloe
Casteilo
Casstelo
Castelloes
Castielo
Castellowe
Castelos
Castaillo
Cahstell
Caistell
The Costello surname in historical dictionaries
Patronymica Britannica (1860)
COSTELLO. Among the many ANorm. settlers in Ireland, temp. Henry II., was Hostilio de Angulo. His descendants were called Mac-Ostello (son of Hostilio) which by still further corruption became Costello.