Herbert Barnum and his brother Adalbert were twins.
The 1905 US Census for the 10th Ward, Rochester, NY shows Lottie and Herbert living in the same household as Herman Rocktaschel, 24 years, his wife Margaret Rocktaschel, 26 years and daughter Rosemary Rocktaschel, 9 months. Herbert S. Barnum, 28 years, Lottie M. Barnum, 24 years, Dora V. Barnum, 9 months and Lottieās mother Dora Garison (Garrison). All born in the United States.
The 1910 US Census for the 10th Ward, Monroe County, New York shows Herbert I. (should be S.) Barnum, 33 years, Lottie M. Barnum, 29 years, Claude S. Barnum, 2 years, 6 months and Lottie's mother Dora Garrison, 51 years. All born in New York.
The 1915 New York State Census shows Lottie Barnum, 33 years, still living in the 10th Ward, Monroe County, New York.
The 1920 US Census shows Lottie Barnum, 39 years, widowed, living in Monroe County, New York with sons Claude Barnum, 12 years, Herbert Barnum, 6 years and Dora Doxtater [sic], 60 years.
The 1930 US Census shows Lottie Mayer, 48 years, born in NY, living in East Rochester, Monroe, New York with head of household John J. Mayer, 49 years, born in North Dakota and Herbert A. Mayer, 16 years, born in NY.
The 1940 US Census shows Lottie Mayer, 59 years, living in Pittsford, Monroe, NY with head of household Herbert Barnum, 26 years and wife Kathryn Barnum, 26 years. All born in NY.