Notes:
Data source is Leora Rabuck, 1920 3rd Ave., Altoona PA
I think Cornelius was named for his maternal Grandfather Cornelius Gramm. 1840 census West Hempfield Twp. Lancaster Co. PA. Cornelius over 40 under 50. male over 10 under 15 female over 10 under 15. female over 5 under 10.
Cornelius death from Vital records of census for 1850. From census .. Cornelius married no. 2 a widow lady Catherine Brown who has a daughter Elizabeth Brown born ca. 1845...age 5 on 1850 census.
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1840 United States Federal Census
Name: Cornelius Mumma
Home in 1840 (City, County, State): West Hempfield, Lancaster, Pennsylvania
Free White Persons - Males - 10 thru 14: 1 (Cornelius Jr. age 10)
Free White Persons - Males - 40 thru 49: 1 (Cornelius Sr. age 48)
Free White Persons - Females - 5 thru 9: 1 (Anna age 6)
Free White Persons - Females - 10 thru 14: 1 (Catherine age 14)
Total Free White Persons: 4
1850 Census PA, Lancaster Co., West Hempfield twp. 3rd September 1850, p. 170
Catherine Mumma, 58, b: Lancaster Co., PA
Cornelius " , 20, laborer, b: Lancaster Co., PA
Ann " , 16, b: Lancaster Co., PA <======== listed as living with brother & mother
Elizabeth Brown, 5, b: Lancaster Co., PA
1850 Census PA, Lancaster Co., Marietta, 26 Aug 1850
Francis Storm, 26, laborer, b: PA
Catherine " , 24, b: PA
Ann " , 10, b: PA
Francis " , 7, male, b: PA
Maria " , 1, b: PA
Ann Mumma, 16, b: PA <========== listed as living with sister