The oldest name mentiond is Kemmerswerth (1275). And around (1400): Kemswert, (1510): Kymsuard
16 century maps mostly spell Kymswert, the Frisian 16 century spelling is Kymsert.
In the 17 century its mostly Kimswert, and ever since the 18 century Kimswerd.
The second part of the name is werth (origional from the verb warjan which means turn/twist, and is used for fences made of willow branches) this name warjan later evolved to worth,wurthi,werth and later wierde (Terp)
You can find these names across villages in England, Fryslân, Groningen and Germany.
The first part of the name is Kim, Particle of a name (man) which ment: camp/battle (ps: camp also ment battle not campsite) (pps: very normal those days to call an area by the nature around it or
by the name of the founder or an importent person)
This is a fact and suits the story of Greate Pier just fine
reference: Friese Plaatsnamen written by Karel F. Gildemacher