Need to seal the deal on this sib set

My ideas for girls are [name]Sunday[/name] [name]Kate[/name], [name]Stella[/name] [name]Rose[/name], and [name]Sutton[/name] [name]Grayce[/name]

My boy names that I am thinking of using are [name]Knox[/name] (my maiden name) And McLaine.

I have no idea where to go for middle names for these boys though.

Another boy name I am really liking is [name]Maddox[/name]- but I couldnt use it as a first name bc it is too matchy with [name]Knox[/name].

I have thought of [name]Knox[/name] [name]Lennon[/name] (but hubby wasnt crazy about it!) I need help! Also is [name]Knox[/name] too overplayed? What’s your opinion? And what are your MN ideas?