What does "aftername" mean?

A designation which comes after a name, similar to, yet not necessarily equivalent to one's last name

Aftername

noun

noun ·Rare ·Advanced level

Noun

1
A designation which comes after a name, similar to, yet not necessarily equivalent to one's last name
"'Oh, Lord kens that; we dinna mind folk's afternames muckle here, they run sae muckle into clans.'"

"'Oh, Lord kens that; we dinna mind folk's afternames muckle here, they run sae muckle into clans.'"

From after- + name.