Koby is a distinctive boys' name in United States, ranking #2174 in 2025 with 66 recorded births. The name reached its all-time peak in 2000 with 411 births ranking #533. Since 1996, the popularity has decreased by 43.1%. In 2025, approximately 1 in every 25,880 boys born was named Koby. STABLE Recent data shows the name is currently stable.
Koby is a modern English spelling variant of Coby. Through that route it belongs to the Jacob family, which is traditionally associated with the meaning "supplanter".
Behind the Name treats Koby directly as a variant of Coby, which makes its broader lineage clearer than some neighbouring spellings. The name’s modern feel comes from the spelling, not from a newly invented root.