Aftername

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

Source: wiktionary

Not only did the saints have all these afternames but the heroes and ancestors had twice as many of an identical pattern. And soon I observed that the first names were composed of the same elements as the afternames.

Source: wiktionary

In England, in the Middle Ages, an individual sometimes used alternative afternames, that of his place of residence, his trade, or that of his master instead of that of his father.

Source: wiktionary

'Now is Dog the first name you have or the aftername?'

Source: wiktionary