Der is a derivative (English) of the Dutch, English, and German Derek.
Der is also a derivative of the English Dermot.
Der is not often used as a baby boy name. It is not in the top 1000 names. Out of the family of boy names directly related to Der, Derek was the most commonly used in 2018.
Baby names that sound like Der include Dare (English), Darr, Derr, D'Or, Dar (Hebrew and English), Darow, Dáire (Irish), Deetar, Dhoire, Dhoyre, Dire, Dor, Dore, Doyre, Dray (English), Dre (Dutch and English), Drew (English, Scottish, and Welsh), Drewri, Drewrie, and Dru.
† Pronunciation for Der: D as in "day (D.EY)" ; EH as in "ebb (EH.B)" ; R as in "race (R.EY.S)"