Question about the name Olivia.....

[name]Hi[/name]! I was wondering if anyone knew if the name [name]Olivia[/name] is the English form for the name [name]Olga[/name]? I have an old baby book from 1995 that states this. I know a lot of baby books information is inaccurate. I wasn’t able to find anything online to back this up. Thanks for your help!