| b 1833, , Cumberland, Pennsylvania | James McTeer | d 1914, , Cumberland, Pennsylvania | William McTeer | Margaret Anderson |
| James Mateer | b 02 Dec 1738 | William Carothers | ||
| | b 01 Nov 1765 | Margaret Carothers | Jean | ||
| William Mateer | d 23 May 1832 | b 1702 | ||
| |b 13 Sep 1792 | | | William Ross | ||
| |d 24 Jun 1834 | Elizabeth Ross | |||
| | | b 22 Apr 1769 | Jean Nesbit | ||
| Mary Jane Mateer | d 25 Sep 1804 | |||
| |George W. Mumper | |m 02 Nov 1854 | |||
| | | | | |||
| Mary Ann Porter | ||||
| b 15 Aug 1800 | | | |||
| d 15 Jan 1882 | ||||
| 1 | William Murray Mumper | 2 | John Mumper | 3 | Lulu B. Mumper | 4 | George B. McClelland Mumper | 5 | Samuel Mumper | 6 | Mary Ann Mumper |
In the 1880 census of Lower Allen Township the Mumper household included George W., farmer aged 52, Mary J. aged 47, Lulu B. aged 20, George B. aged 18, Samuel aged 14, Mary Ann aged 12, Frederick Rehm, laborer aged 21, Mary A. Baley mother-in-law aged 80, and Anna E. Mateer, sister-in-law aged 51 years.
On 15 March 1913 George W. Mumper and wife Mary J. of Elkwood, Lower Allen Township, for $1575, deeded to Amos A. Mailey of Harrisburg, Dauphin County, Pennsylvania, five acres in Lower Allen Township, this land was part of a tract containing 107 acres 10 perches, 'title to which became vested in William Mateer and Jane his wife by deed of Robert Mateer dated 28 May 1822 ... the said William and Jane Mateer having died intestate leaving to survive them three daughters as their heirs-at-law ...(viz.) Annie E. Mateer single, Margaret Caroline intermarried with Dr. E. B. Barndt, and Mary J. intermarried with George W. Mumper'; the said Margaret Caroline and her husband deeded on 1 Aril 1864 their undivided third interest to George W. Mumper, and the said Annie E. Mateer died testate on 11 February 1908 devising her share to George W. Mumper. Some of the lots in New Cumberland Boro were laid out from this tract.
On 26 December 1914 George W. Mumper widower and Mary A. Mumper unmarried, both of Lower Allen Township, along with George B. Mumper and wife Elizabeth B. of Harrisburg, Pennsylvania, quitclaimed to Samuel Mumper of New Cumberland on several lots in New Cumberland.
The will of Mary J. Mumper of Elkwood, Lower Allen Township, written 21 April 1908, probated 7 January 1915, bequeathed to daughter Mary A. Mumper, all personal property, also a house and lot located at 11th and Bridge Streets in Elkwood; to daughter Mary A. Mumper and sons George B. And Samuel Mumper jointly, 'my one-third undivided interest' in a 106 acre farm in Lower Allen Township, adjoining lands of Haldeman heirs, McCormick estate, Forest Hunter, Zimmermans and J. J. Baughman. Executors: daughter and sons. Witnesses: M. L. Keeny, William Wallers.
The will of George W. Mumper of Elkwood, Lower Allen Township, written 18 February 1915, probated 14 January 1918, bequeathed to his son Samuel Mumper, a grandfather's clock, to his daughter Mary A. and to his sons George B. and Samuel in equal shares all other property including a two-thirds interest in a 106 acre farm in Lower Allen Township; but son Samuel's and son George B.'s shares to be subject to an advance of $1500 to each. Executors: daughter and two sons. Witnesses: J. H. Reiff, Clayton Snell.
Source: McTeer - Mateer Families of Cumberland County Pennsylvania, Frances Davis 1975, p 105.