I say PE-CAN, rhymes with ‘American’..............
Around here it is Pah-Kahn ... like Star Trek II Wrath of Kahn.
Pecan is a Native American (Algonquin)word and is properly pronounced pehcahn. It is also a Native North American tree, found only in America anbd Mexico.
The PE-CAN is what your dad made you use on long road trips when he didn’t want to stop the car.
I remember my parents arguing about the right way to pronounce pecan. My mom was from CA and my dad was from AR.
I say “pa-con.” 7th generation Southerner. We’ve always said it like that.