Jaden is tricky because it's spelled dozens of ways (Jayden, Jaidon, Jaedyn, etc.). Some of these spellings are just as common for girls as they are for boys, while others are nearly boys-only. Overall, the Jaden "group" of names is used more often for boys, but a sizable minority of girls do get the name every year as well, so I think it's wise to be concerned about gender.
Here are a few other ideas:
Jasper
Jett
Judah
Julius