Emlyn: It may look a bit made up, but Emlyn is actually a traditional Welsh name used for boys. Here in the US, it has loads of potential to sit alongside feminine choices like Kaitlyn, Evelyn, and Emmalyn. But Emlyn will catch most by surprise, as it's rather rare in this country. Celtic Baby Names
Emrys: Welsh, Immortal. The druid name of Merlin in the BBC series Em-riss in Welsh but would probably be pronounced Em-rees in USA, NN Rhys/Reece #BabyNames
Menna. This Frisian name comes from names related to Old Norse name element megin, meaning "might," such as boy's name Magnus. Also a Catalan form of Mina, a modern Welsh name, and an Arabic feminine name, as well as a Biblical and Egyptian masculine name.