Yuma is also a female name but spelt with one 'u' instead of two. It is more of a modern name for females and is very trendy written like this (ゆま) using the hiragana writing system (in terms of sound). Yuma is pronounced yoo-mah. (http://5go.biz/sei/cgi/ninki2.htm).
(http://5go.biz/sei/cgi/ninki2.htm).