M, b. January 1866
| Birth* | January 1866 | John J Brien was born in January 1866 at Massachusetts . |
| (with Parents) Census1870 | 11 July 1870 | He appeared on the 1870 Census of Gloucester, Essex County, Massachusetts in the household of his parents, Joseph Andrew Brien and Anna E (?) |
| (with Parents) Census1880 | 21 June 1880 | John J Brien appeared on the 1880 Census of Ferndale, Humboldt County, California in the household of his parents, Joseph Andrew Brien and Anna E (?) |
| (with Parents) Census1900 | 5 June 1900 | John J Brien appeared on the 1900 Census of Ferndale, Humboldt County, California in the household of his parents, Joseph Andrew Brien and Anna E (?) |