If you take a look at the Namesakes listed for
Julian, you'll find a boxer, two Olympic medallists and a Nobel prizewinner for physics! If that isn't a cure for insecurity, I don't know what is.
I like
Julian too. My only concern would be that it is longish and I don't at all fancy
Jules or
Julie or
Ju as nns - if those can be avoided, then go for it.
I decided to use
Juliet only as a mn, given enough daughters, for that very reason.
For a mn, if you do have masculinity concerns, it might be wise to avoid unisex names and go for something pleasantly laddish like
Gregor.