Martin O’Brien Jr.


1900 Jefferson County, MO Census, Rock Township

Martin O’Brien, Physician, Born Nov 1874, Age 25 Married 2 years, MO MO MO

Hulda, Apr 1880, 20, mother of 2, 2 living, MO MO MO

Neoma, Feb 1898 2, MO

Paul, Dec 1899, 5/12, MO


State Board of Health Certificates

Jefferson College 787 II D R

Martin Y. O’Brien 1897 St. Louis (college)


Jefferson Democrat Aug. 25, 1898


M. Y. O'Brien M.D.

Physician & Surgeon

High Ridge, MO

Sundays at Rock Creek Post Office


Jefferson Democrat Aug. 25, 1898

Dr. O'Brien has just completed a costly residence for his family.