Ernie (English pet form) is a variant of Ern.
Ern is not regularly used as a baby name for boys. It is not listed in the top 1000 names. Out of the group of boy names directly linked to Ern, Ernest was the most frequently used in 2018.
Baby names that sound like Ern include Ernö (Hungarian), Eirm, Erm, Earnee, Earney, Earni, Earnie, Earny, Earwen (English), Ehren (English), Eirian (English, Gaelic, and Welsh), Eirwyn, Eran (English and Hebrew), Erin (English), Erine, Erinn, Erinne, Ermen, Ermin (German), and Ermo (Italian).
† approx pronunciation for Ern: ER as in "hurt (HH.ER.T)" ; N as in "knee (N.IY)"