And to expand on what Lori just said, if you do a trademark search, you'll find 43 trademarks of the word 'Kona' held in the US alone...not all by the Robert Kaufman company. There's the US Soap Corp, AJA Video Systems Inc, even the Kona Corporation, along with many, many others.
Kona is a Hawaiian word that means leeward (the windy side). There's Kona Coffee, Kona Brewing Company, Kona Grill, Kona State Park, Kona Mountain Bikes, and on and on. The mere use of the word does not relate it to Kaufman Fabrics in any way, shape or form.