"Variant of Gretel"
The name Grettel is commonly a female name from the "German" origin.
Grettel is a spelling variant of Gretel, the German diminutive of Margarete (English Margaret). Gretel is the form used for the girl in the Grimms' tale of Hansel and Gretel, first published in 1812. The doubled t is a spelling variation; the name is the same one, and the variant spelling is the form that appears in United States birth records.
Gretel means "Pearl; Daisy. The Slavic, Swedish, German form of Margaret.".
The pronunciation of Grettel is GRET-ul.