you also have a good way. i once had the same way, but children would have the father's name along. i have two familys. one is this and the other is this;

Lake Beautiful
Sogan Beautiful
Fiji LakeSogan Beautiful

Ponui
Ema
Etini PonuiEma

when Etini marries Fiji, Etini's name would change to Etini PonuiEma Beautiful.

this is so fun for me too, kitaelia!