Baby name doubts! Need help!!

So we’ve had our future baby’s names picked out pretty much since we started ttc in 2018. We had our first baby boy in January this year and his name was always Rowan, before he was even conceived. We loved it and it fit him so well. His original middle name was suppose to be Oliver but we switched it out for a family name on his dads side. Now we’re pregnant with #2 and it’s another boy. His name from the beginning was going to be Theo Oliver. We’ve been calling him Theo since we found out he was a boy. I loved it but now I’m having doubts about naming him Theo. My mom brought up nicknaming him Ollie since his middle name would be Oliver. I think that’s so adorable! So now I’m thinking.. what if we just named him Oliver? Or find another middle name to go with Theo and keep Oliver for another future baby boy? Idk.. & if we do name him Oliver, I have no idea what middle name to give him. I like Oliver Wilde and wanted Theo’s middle name to be Wilde but my partner didn’t like that but he loves Wilde as a middle name for Oliver. I’m 25 weeks so we have plenty of time to think it over and talk about it..

What do you all think? & if you have middle name suggestions for Theo or Oliver, I would love to hear!