Thanks, I forgot about that (we use to live in Scotland). Ok, if I cross out Caleb which I think I have to do unfortunately as they are so similar. I've got the following that my husband and I both like but aren't sure.
Maddox Jacob Liam Ethan (which I'm concerned might be very popular?)
We have a Kayden in the family and i agree what others have said Caleb is too similar. I think Jake and Ethan are nice. If you wanted something that wasnt as popular I would go for Liam, i dont no any little Liams.
Jacob is the nicest imo. Jake is nice as a nn but needs a longer name I think. Caleb is too close to Caden. Liam is nice but too nickname like imo. Maddox goes the best with Kaiden but I'm not sure if its too out there. I think Ethan is also quite similar to Kaiden and quite popular.