"Variant of Renata"
The name Renia is commonly a female name from the "Latin" origin.
Renia is the Polish familiar form of Renata, used both as a short form of that name and as a given name in its own right. It is attested in Polish usage well before the twentieth century's midpoint; the diarist Renia Spiegel, born in Poland in 1924, was named Renata. English-language use of Renia is best explained as the same Polish form carried into English-speaking countries rather than as an independent coinage.
Renata means "Reborn".
The pronunciation of Renia is REN-ee-uh.