Bogi Björnsson was born on August 20, 1862 in Strandasýsla.
Spouse: November 28, 1890 Hallfríður María Magnúsdóttir b. in 1872 in S. Þingeyjarsýsla, d. August 3, 1913 in Washington.
Children: 1. Elín Þórdís b. July 19, 1891, d. March 1, 1931 2. Margrét Isabel b. January 30, 1893 3. Magnús Gilbert b. October 22, 1895 4. Anna Guðrún b. April 19, 1897 5. John Alvin b. February 22, 1900 6. Karl (Carl) b. October 7, 1903 7. Bertil Oliver b. October 1, 1908 8. Harold Melsted b. April 26, 1911. All were born in Seattle.
Bogi came west to N. Dakota in 1885 but moved west to the Pacific early in 1891. Hallfríður came west in 1876 with her widowed mother, Elín Magnúsdóttir, and siblings. They first lived in New Iceland, but moved to N. Dakota in 1881. She and Bogi settled in Seattle, Washington.