The name might be changed to Lynne (The Empty Planet), as written in the subs. Lynne isn't mentioned elsewhere
Talk about it here.
Lynn was the aunt of Gavin.
Lynn and her husband took care of Gavin after Gavin's mother died. She and her husband didn't care much about Gavin and Gavin often felt alone. When Gavin left Earth, they were told that Gavin moved to other relatives in Australia. (TV: The Empty Planet)