I've actually seen
Trajan turn up as a boys' name in the USA several times in recent years. As a two-syllable name ending in -n and have the "long A" diphthong in the first syllable, it fits right in with many other fashionable boys' names right now.
I do think it would make a lot of people think "Trojan", but of course the association with condoms may be a purely American thing. Are Trojan brand condoms sold outside of North
America?