Last name Kelly-Flynn (Kelly-Flynn 
) , across the world, is a very rare cognomen. The family name Kelly-Flynn is characteristic of Northern Europe, particularly Ireland, where it is a rare surname, and the United Kingdom, where it is an extremely rare surname. Parts of the name also exists independently as a first name Kelly, and a last name Flynn.
| VARIANT | COUNTRY |
|---|---|
| Kelly-Flynn | Ireland, United Kingdom |