keith
n. countablen. a common traditional name for a man. It is a name given to boys in English-speaking countries.
n. a masculine given name of Scottish origin. When used as a proper name, it is typically capitalised.
My friend Keith lives in London.
The manager, Keith, will be available to answer your questions after the meeting.
While the name Keith reached its peak popularity in the mid-twentieth century, it remains a recognizable staple of traditional British and American naming conventions.
As a Scottish surname, from the placename in Moray, Scotland, from Scottish Gaelic Cèith, meaning "wood" or "from the battleground," which is probably borrowed from Pictish ᚉᚓᚈ (cēt) meaning "wood", or a forest, from Proto-Brythonic *koɨd. * As a German surname, from Middle High German kit (“sprout, offspring”) (compare kint).
As a proper noun, it is almost always capitalised.