Likely a variant of Tashin or Taslim
Tasheem is a rare name likely derived from Arabic roots. It is often associated with the name Taslim, meaning submission or peace, or potentially linked to Tashin, meaning to beautify or improve. Its exact etymology is less documented than more common Arabic names.
Less common today
Tasheem isn't in the latest US Top 1000. It last peaked at #4,135 in 1996.
US births per 5-year period, 1990βpresent (SSA data).