Óli Sigfinnsson was born on April 27, 1863 in N. Múlasýsla. He died on January 20, 1928.
Spouse: October 27, 1907 in Winnipeg, Anna Jónsdóttir b. 1875 in Þingvallasveit.
Children: 1. Sigfinnur Halldór b. February 17, 1910, d. August 29, 1911 2. Jósef Sigfinnur b. 1912 3. Kristín (Christine) Lilja b. 1915, d. July 18, 1946.
Óli came west with his father, Sigfinnur Pétursson, and his wife, Sigurbjörg Sigurðardóttir, in 1878 and settled in the Lincoln County Settlement in Minnesota. Anna came west with her mother, Vilborg Árnadóttir, in 1885. They traveled to Winnipeg where Anna later married. She had two daughters with her first husband: 1. Mabel b. 1899 2. Laura b. 1902. Anna and her daughters had the last name Johnson. Óli and Anna married in Winnipeg on October 27, 1907. They first lived in Lincoln County, but then moved to Lyon County.