I like the idea od having two mn's for the simple fact that you get to use more names! I wouldn't and won't be using two mn's though. I like the eveness of 1 fn, 1 mn and 1 ln!
I love the name
Jack. To me it's masculine and classic, it's just very popular right now. I don't see it as trendy though, because to me trendy names are popular for that particular space and time and will age terribly. I love the following
Jack combos:
Jack ArchieJack OliverJack Remington
Jack ErnestJack VincentJack XavierJack FinleyJack DarcyJack SebastianJack IsaiahJack RaphaelJack ElijahJack TobiasJack NicodemusJack Hamish