This has spiraled a bit out of control, though if we have honored writers among us perhaps we can gain enlightenment
I have yet to find a cannon answer about marriage rules in L5R. Who takes whose family name? It seems logical to assume that whoever has the highest rank/glory would keep their name, so in Altansarnai's case she runs into a male-centric Ikoma tradition/rule that subverts this?
I know back in Old5R 1st edition the female would usually take the male's family name, with the exception of the Matsu and Otaku families being matriarchal. If this is covered in the new FFG RPG at any point please set me straight as I haven't been able to pick up a copy yet.