Oak tree
Derived from the Irish word 'dair', meaning oak tree. In Celtic culture, the oak was a sacred symbol of strength, longevity, and wisdom. It is often found as a prefix in longer Irish names like Dervla or Dermot.
Less common today
Der isn't in the latest US Top 1000. It last peaked at #5,374 in 1993.
US births per 5-year period, 1990–present (SSA data).
