Airbus tried and failed to make their own blended winglets for the A320 last decade.
Eventually a few years ago they went to Seattle with their tail between their legs and Aviation Partners (the ones who make the 737NG blended winglets) sorted them out.
I guess that's why they look very similar to the 737NG blended winglets.
As for the "sharklets" name... I guess the
PR department is desperate to make them sound like new technology... after all, no other airliner has "sharklets"!