Mine: Lynn, same reason as above. The go-to middle name in the 70's
DH's: Z. He was formally adopted as a teenager (after I met him) by his stepfather, and since he never had a middle name, he kept Z which was the first letter of his original last name.
Our kids:
DS1: Orion. After Orion's Belt
DD: Grace. Because I love the way it sounded with her first name.
DS2: Joel. Supposed to be Nicholas, until 2am the morning I was to be induced, when DH woke me up to urgently tell me that he thinks the middle name should be Joel (after DH's twin brother) rather than Nicholas. Knowing I wasn't going to get another good night sleep for the next 6 years (or more) with a 5 year old, 19 month old, and newborn in the house, AND almost absolutely positive that I was carrying a girl so my DD could have a SISTER, I promptly agreed so I could fall back asleep, dreaming of meeting my perfect sweet little Olivia Isabelle. My 3rd and final baby - A BOY - was born later that day as A. Joel instead of A. Nicholas, and he cracks up at the thought that he was almost christened with the middle name of Nicholas!