This may already be a thread, so sorry if it is.
I just get stuck on sibling names because I never know if I should have them all start with the same letter, or all be of the same origin, or whatever.
If you struggle with this- this may help you out.
Put a fn and mn you adore together and the next person will post up to four siblings that they think go with that name. They then will give a fn and mn (doesn’t matter the gender) and so on. I’ll start: