Needing baby name ideas

Me and my SO will find out what baby ( #2 for me / #4 for him) will be in 4 1/2 weeks. Need some help on picking out baby names. His oldest 2 daughters initial are KMM our daughter that we have together initials is AFM. I would like to try to do the AFM initials if it’s a girl but it necessarily don’t have to be. And it doesn’t matter on the boy. Help please!