Callum–Michael - sounds nice but I don't get the hypen. Why not just
Callum Michael? Or if you want them both as the first name, why no middle name?
Callum Alexander James - sounds nice. I like
Calvin John - ok, feels dated
Cameron - ok
Campbell Alastair - I kind of like it. Not the best flow though
Cayden
Bryce - very trendy but sounds nice & the names complement each other
Charles Eric John - feels very choppy
Charles Stephen - ok
Charley John -
Charley is better as a nickname
Charlie Colin - This doesn't flow at all
Charlie Ethan - sounds nice but prefer
Charlie as a nickname
Charlie John Charlie John Robert Cian Newall
Cohen Hadley - sounds nice but too surnamey
Connor Aaron - not the best flow
Connor Christopher - I really like this - nice flow & alliteration
Connor Scott - feels a bit choppy but not bad
Cooper Cameron - doesn't flow
Cruz William - ok but
Cruz is too trendy for my taste
I am seeing the UK likes using nicknames as given names a lot.