Costello

• Costilow, Costley, Costlow

Reduced Anglicized form of Irish Mac Oisdealbhaigh (“son of Oisdealbhach”), a personal name composed of the elements os (“deer”) and dealbhach (“resembling, in the form of”).

• (US) IPA^(key): /kɑˈstɛloʊ/
• (Ireland) IPA^(key): /ˈkɑstəloʊ/

Costello (plural Costellos)

1. A surname from Irish.

• Costello syndrome

• According to the 2010 United States Census, Costello is the 1093^rd most common surname in the United States, belonging to 32043 individuals. Costello is most common among White (90.85%) individuals.

• Costelloe

• Hanks, Patrick, editor (2003), “Costello”, in Dictionary of American Family Names, volume 1, New York City: Oxford University Press, →ISBN, page 373.