Invented name, likely a variant of Jalen
Jhalen is a modern American invented name. It is most likely a creative spelling variant of Jalen, a name that rose to prominence in the 1990s via basketball star Jalen Rose, whose name was a portmanteau of his father James and uncle Leonard.
Less common today
Jhalen isn't in the latest US Top 1000. It last peaked at #5,956 in 2001.
US births per 5-year period, 1990βpresent (SSA data).