Alfred is traditionally used to derive a surname. It means "wise" in both French and English: "governing with elf-wisdom" in French and "counselor" in English. It is used for both boys and females. Fern's brother in Charlotte's Web is a well-known Avery. There are many people with the first name Alfred in the US, so it isn't very unique. But there are only three other names that are derived from the word "awe" (as in "I am awed by your knowledge of physics!"): Avery, Abe, and Andy. And only one of these names can be used as a first name. So the name Avery is unique because there aren't that many names that start with "awe".