I don't think the same initials is too tricky, unless maybe you both had a middle name starting with the same letter, and then maybe the worst that could happen is someone opens the wrong mail?

I never used to love Caden and Lincoln, until friends used those names and now I think they are really cute names, and Lincoln is quite nice long.

IMO it doesn't really matter if Caden is too close to your friends child's name?

(we're also finding the name thing really hard, and the one name we liked I told my sister and she going on about how it was the only girls name she liked and she told us that 12 months ago and now I feel like even though I like it (my partner not so much since my sister said those things) I can't use it )