Koby is a distinctive boys' name in England & Wales, ranking #621 in 2025 with 60 recorded births. The name reached its all-time peak in 2021 with 119 births ranking #375. In 2025, approximately 1 in every 4,532 boys born was named Koby. FALLING Recent data shows the name is currently falling.
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.