Lewellyn is a unisex name that has its origins in Wales. It is a variation of the name Llewellyn, which means "leader" or "lion-like." The name Lewellyn has been used for both boys and girls and has gained popularity over the years. In terms of pronunciation, it is commonly pronounced as luh-WEL-in (/ləˈwɛlɪn/) in English. The name has been recorded in the United States since the early 20th century, with varying levels of popularity. It reached its peak in the mid-1900s but has remained relatively rare since then. Nevertheless, it carries a sense of strength and leadership, making it a great choice for parents who want a unique yet meaningful name for their child.