Of course it's pretentious, but it also happens to have the greatest meaning ever! I'd love to work this into a child's name, just so they could have "having a moustache" in their name.
My picks:
Algernon CyrilAlgernon FrancisAlgernon GaspardAlgernon LouisAlgernon PerryAlgernon PhilippeAlgernon ThomasAlgernon Vincent