Jillian is a ♀ female name.
Jillian is a variant of the name Gillian, which is a feminine form of the name Julian and is existing since the 17th century.
Jillian means “of the family of the Julii” and “dedicated to Jupiter / Jove” (from Latin “Iovilius”).
Jillian is beautiful, and we know a lot of other names like this...
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