Sheila

wiktionary

ref

From Sheila(“female given name”).

From Arabic شَيْلَاء‎ (šaylāʾ)

etymonline

ref

Sheila

fem. proper name, Irish equivalent of Celia, shortened form of Cecilia, the fem. form of Cecil. A standard type of an Irish women's name since 1828; slang for "girlfriend, young woman" dates from 1839.