Gnomish Naming Conventions

The Gnomes of Agghorion have an odd naming convention. 
The First name is given at birth, the Family name is their mother's Second name, the first middle name is selected at age 50, and the second middle name is chosen by their life partner. Most often, married couples will share their second middle name with one another. 
For example Yexim Uricorin Jegim Ertix.

1. Yexim is the first name given at birth
2. Uricorin was the mothers Family name, and thus passed down
3. Jegim was chosen when they reached age 50
4. Ertix was selected by their partner on their wedding day.