It sounds like a variant of the name Jamila, which is an Arabic name, and the feminine form of the name Jamil. I'm not sure if this is actually the source of it or not, but it's something to go with until a more accurate answer pops up.
Ancestry.com. U.S., Social Security Applications and Claims Index, 1936-2007 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2015.