From the carding valley or wool-comber
Karden is likely a modern variant of the English surname Cardon or Carden. It historically refers to an occupational name for someone who 'carded' wool or lived in a valley where teasels grew, which were used for combing wool.
Less common today
Karden isn't in the latest US Top 1000. It last peaked at #7,494 in 2017.
US births per 5-year period, 1990βpresent (SSA data).