Help!!! Boy/Girl twins names????

My 5 year old girl twins are named

1. Auryla Sky (Rylee) pronounced o/ry/la

2. Kimber Leighanna (kimee)

Loved these names it worked out since my name is Aimee :)

So now I’m 24 weeks with boy/girl twins and I’m struggling on the girls name. I was sure I wanted Grayson and Krimson but now Grayson is so common so I’m switching to

3. Duluth Grayson for twin a

4. Krimson ..... now stuck on a middle name for twin b

I know my kids names are original but I really just want it to flow. Any suggestions???

Help!!!!! Please anyone???