"Variant of Natasha"
The name Natacha is commonly a female name from the "Russian" origin.
Natacha is the French spelling of Natasha, the Russian diminutive of Natalia. Natalia goes back to the Latin natalis, "of birth", from the phrase dies natalis, "day of birth". French uses the -cha ending where Russian and English use -sha, so the name is the same one in a French orthography.
Natasha means "To be born".
The pronunciation of Natacha is nuh-TAH-shuh.