Sibling names too similiar?

Are the names [name]Sacha[/name] (pronounced Sar-cha) and [name]Saskia[/name] (pronounced Sass-kia) too similiar for sisters? And if so, do you have any suggestions for girls names with the same feel as [name]Saskia[/name]? Thanks.

[name]Hi[/name]! I am a French speaker and I don’t understand why you say [name]Sacha[/name] is pronounced that way. Is that how English speakers pronounce it? It’s also a boy’s name, not a girl’s, so I don’t see it as an option if it was me. Sorry I don’t have any suggestions. Good luck!