Kolby is a name of American origin, derived from the English surname Colby, which itself comes from the Old Norse word "Kálfr," meaning "strong" or "powerful." The name Kolby is thought to have originated as a nickname for someone who was considered strong or mighty in some way.
The name Kolby first appeared in American records during the late 19th century, but it didn't become popular until the latter half of the 20th century. Today, Kolby is a unisex name that is more commonly used for boys than girls, although it has been given to both sexes throughout its history.
In terms of popularity, Kolby peaked in usage during the late 1990s and early 2000s, reaching its highest rank of #578 in the United States in 2003. However, since then, its popularity has decreased slightly, but it remains a well-known name in American culture.
Overall, Kolby is a strong and powerful-sounding name with an interesting history behind it. Its origins can be traced back to Old Norse roots, giving it a unique and distinctive character among other names of American origin.
"The name Kolby experienced a significant boom in popularity between the late 1980s and early 2000s, with over 700 births occurring annually from 1990 to 2004. However, it has since seen a steady decline, with fewer than 300 births per year recorded since 2012."