Centenarian Marilyn Ozinga Istel was one of the matriarchs of the family that owns and controls Ozinga, the Mokena-based ready-mix concrete supplier.

“She was just a very pleasant girl,” said Dolores Lewandowski Wasylik, 102, a longtime friend who met Istel at the Prestwick Country Club in Frankfort. “She was very sweet, very matter-of-fact and she was very religious.”

Istel, 100, died of natural causes on Aug. 30, said her son, Richard. She had been a longtime Frankfort resident.

Born Marilyn Seils in Chicago, Istel was the daughter of a Chicago policeman, Otto Seils. She grew up in Evergreen Park during most of grammar school, but then, after an edict requiring that Chicago police officers live in the city, she moved with her family to a house at 8315 S. Wood St., in the nearby Southw

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