The Weylan are a fundamentally trustworthy people if you ask most races. But their Contact with us was not always smooth. The Protestant wing of Christianity that is most strongly concentrated in America does not appreciate blasphemy against God. Naming your child Jesus for instance is simply not done. It would be presumptuous at best. But the Catholic wing of Christianity strongest in the Southern and Central Americas is far different. Jesus is one of their most common names. It is a hopeful name. An honor to wear. The Weylan as it turns out are at least as deeply religious as the Americas are, and that is why their name for soldiers translates into the word Seraph. They are honoring the angels of their own faiths, and pledging to live up to those examples.