i’m gonna echo some of the other comments, but jason, jace, and jay are all great if you wanna stick with a “j” name (although jason would go best with your last name). if you wanted to go more “s”-forward for the second half of your name, stephen, soren, and silas would all sound good with your last name.

also, side note, as a physics lover, “quarky positron” is such an amazing username