Jillian

Jillian is a feminine given name used in English-speaking contexts. It is a variant of Gillian, which derives from the medieval name Julianus, a Latin form ultimately related to Julius. The form Jillian, like Gillian, has been used as a modern feminine derivative of the classic name.

In usage, Jillian has appeared primarily in English-speaking countries. The spelling with a J-I-L-L-I-A-N is common in the United States, while Gillian remains a frequent variant in the United Kingdom and Ireland. The name gained popularity in the late 20th century and continues to be in use, though it is not among the most common names today.

Notable people with the name include Jillian Michaels, an American fitness expert and author, and Jillian Bell, an American actress and comedian. In fiction, Dr. Jillian Holtzmann is a notable character in the 2016 Ghostbusters film. These examples reflect the name’s broad appeal across fields such as entertainment, sports, and media.

Variants and related names include Gillian (another common spelling), Gill, Jill, Julian, Julia, and Julie. The name is often shortened to Jill in informal use. As a classical-derived name with enduring English usage, Jillian continues to be chosen for its traditional associations and contemporary sound.