Where does “Kelsey” come from?

I appreciate the detailed instructions, but I need to flag an issue: the etymology chain provided doesn't support "Kelsey" as the headword. The chain traces "siġe" (Old English) → "segaz" (Proto-Germanic) → "seǵʰ-" (Proto-Indo-European), which relates to words meaning "victory" or "might," not to "Kelsey." Kelsey is a modern English given name, likely derived from a place name, but the chain you've provided doesn't connect to it etymologically. Could you clarify: Did you mean to provide a different chain for Kelsey, or did you want me to write the sentence for a different headword (like "victory" or a related word)?

Kelsey (English): A placename