oooooh i love these kind of questions!!!!!!
i think that Macaulay sounds great with your last name! here are some other suggestions....
----also Gwendalyn is pretty, very victorian, classic, a well respected name. it's original spelling is Gwendolyn. some other suggestions......
Blythe (Gwyneth Platrow & Blythe Danner)
these are just a few of the names that i am fond of; if you want more just let me know!
Macaulay Kalinowski is a really big mouthful. I like Aiden then best with your last name. :-)
Love the girl name, so pretty classic and feminine! I agree with the PP that maybe a "less syllables" first name could balance your last name better. I LOVE Noah and Liam, and they sound nice with your last name, but then again if your boy went by "Mac" that sounds really good too. It's all up to you (isn't it fun?)!!
You know, I just realized that Gwendalyn is 3 syllables too, but I think it flows so nicely because the emphasis is on the first syllable instead of the middle.
I agree Aidan is the best with your last name. Love Gwendalyn (Gwen) for short. That sounds nice w/your last name also.