- "Gillian" is a feminine name.
- It is of Latin origin, and its meaning is "youthful". It is an Anglicization of "Juliana".
- "Gillian" has been a common name since the Middle Ages. It is often shortened to "Gill" or "Jill", and both are pronounced the same way.
- The masculine form of "Gillian" is "Julian", which is of Greek origin and means "love's child".