My friend's last name is Swaney.

The Swaneys are a lovely family.

The Swangers are a lovely family.

My friend's last name is Swanger.

Swanberg is a common surname in Sweden.

The Swanbergs are a lovely family.

Swanigan is a common surname in some English-speaking countries.

The Swanigans are a talented family of musicians.

The Swangos are a talented family of musicians.

Swango is a common surname in some regions.