
I have a Miqo who was sired by a Tia and (according to my headcanon for her original tribe, which I am leaving up to debate just in case it conflicts with anyone's headcanon for their own tribe) this caused her parents to be cast out of the tribe, so she doesn't have a tribe consonant, or the name of her sire as her last name. Instead she has her given name. Since not having a last name would be inconvenient (she does mercenary work for a living) she took on her mother's given name as her last name. Her brother uses the father's.
There are plenty of reasons why someone could have a name that doesn't fit the lore, so I vote to get creative! Alias, nickname, picked their own name... lots of possibilities.
There are plenty of reasons why someone could have a name that doesn't fit the lore, so I vote to get creative! Alias, nickname, picked their own name... lots of possibilities.