So here's the thing I always found interesting about human last names.
Traditionally, most family's just take the father's last name for the children and wife.
Doesn't that seem kind of antiquated? Imagine what if humans went by a different route way back in the past and it followed onto today.
Imagine if the children had both parents first name as their last names but with a hyphen seperating the two parents name?
It would be a unqiue way of naming and have a consistant way of passing down family heritage.