The fact that the suffix exists at all should show that it's perfectly fine. For Keeper families to have that many males is unusual, yes but, that's purely because males are supposed to be such a minority for the race. I'm not entirely sure about the size of most families for Keepers but, the best guess would be a sort of average of three to five. Again, don't quote me on this as it's only based on the little amount of Keeper lore I can remember off the top of my head.
Point being: The suffix exists, and while rare, there's nothing to say it can't happen.
Point being: The suffix exists, and while rare, there's nothing to say it can't happen.
