In the original script for episode 2, Padme's family scenes were presented in some detail. Her mother was Jobal Naberrie, father Ruwee Naberrie. She also had an older sister named Sola Naberrie, who has two children Ryoo and Pooja.
Source: Attack Of the Clones, by R.A Savatore
Special thanks to Amanda Bingham for bringing this to my attention.
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