Alberdina (Berdina) Steunenberg Paardekooper.
By the time of this 1930 Census, Garret Paardekooper is assumed deceased as Berdina is listed as head of household and a widow. She is age 78. One of her children, Delia (age 48), remains at home along with two grandchildren, Thelma and Hearld, ages 20 and 23. They are assumed to be Delia's children.