Marian and Agnes Wilder were the daughters of
Flora Gamble Wilder, the daughter of
Wilson McKnight Gamble, the son of
William Clifford Gamble, the son of
William Gamble, the son of
Robert Gamble of County Cavan, Ireland
William Clifford Gamble was the father of Wilson McKnight Gamble and the grandfather of Stella, Flora and Alice Gamble.
Below is a link to gravesite information about William Gamble, and his second wife, Ruth Dew Gamble, Wilson Gamble's first step mother.