With words that short, it's no surprise that different people have independently come up with them. Heck, they're both real surnames anyway -- for example, Hollywood sound editor Sam Horta and Swedish tennis champion Bjorn Borg. It's hard to come up with "alien" names that nobody's come up with before. I had a species in my original fiction that I was going to call the Linya, but then Anne McCaffrey introduced a species called Linyaari in her Acorna novels. Then I was going to call them Pharenya, until I realized that sounded too much like Ferengi (and they're a big-eared species). I eventually settled on Zhalevey.