The Family of JoAnn O'Sullivan Manning

I am reasearching the family name of O'Sullivan. My great grandfather came to Calif. by covered wagon in the 1800's. When my grandfather Thomas Patrick O'Sullivan born in1886, was only 5 his father was killed by a trolly car in San Francisco.. My grandmother was Helen Cunningham who was born in Glasco Scotland in 1884 and came to the US at age 23. My father John Joseph O'Sullivan was born in 1919. They lived in Oakland and also Reno, Nevada.I am also researching the name of Hawk. Russel Hawk was born in PA on April 10, 1897 his father was Dr. William Edward Hawk from Michigan who was married to Myra A. Johnson. Russel married Lucile Seals and they had 3 son's William BD 10-15-15, Robert BD 3-1919 and Donald BD 1932.I would appreciate any help that I can get in finding more information on these names.