Though Dara was an (extremely wise) male figure in the Bible, this name couldn't feel more feminine to modern English speakers. The Irish Gaelic version, Darragh, is well-used in contemporary times for boys. In the U.S., though, any Dara would definitely be assumed to be female.
While Dara dropped out of the Top 1000 a couple of decades ago, it's one of those magic names that feels neither fashionable nor UNfashionable. This timeless quality can be an advantage for a child over time. And Dara has the cross-cultural thing going for it as well.
The cousin-name Daria was featured a few seasons ago as the smart and cynical star of her own eponymous animated MTV show.