Bily is a name of Czech origin and it means "strong" or "powerful". It comes from the Old Slavic word "býl", which meant "mighty" or "strength". The name Bily has been used in Czech-speaking countries for centuries, but it became more popular in recent years due to its unique sound and meaning. Although it is not as common as some other names, people named Bily are often considered strong-willed and determined individuals who strive for success in whatever they do. Despite being a name with a powerful meaning, Bily has a soft and melodic sound that makes it appealing to many parents looking for a distinctive name for their child.
The popularity of the name Billy seems to have declined between 1973 and 1978, with an equal number of births each year before dropping off completely thereafter.