Having more or less set our hearts on Jonathan (nn Jonny) for DS2, we've suddenly realised that this is the name of SIL's ex DP with whom things ended quite badly. I know it's a bit odd not to have noticed before, but ex was only ever know as Jon and we just hadn't made the connection. So, it's a no-no apparently 
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DS1 is Christopher (nn Kit) and I really want something with a similar vibe - ie not overused, yet still quite classic and with a cuter boyish nickname.
Names that end in an s don't really go with our surname, and I'm also keen to avoid what I would consider to be particularly 70s/80s names (ie boys I went to primary school with!) like Peter, Matthew, Michael and Simon, as might seem a bit themed alongside Christopher.
I quite like Dominic, but other than that am stumped. There are basically like, NO, names for boys...
Names I do quite like but can't use (and I realise don't necessarily fit with the above criteria either) are:
Barnaby
James
Hugh
Nicholas
Any ideas? I'm going to be really fussy about this though, sorry 
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Thanks!