Notes:
Data source is the pamphlet, "Genealogy of One Branch of the Jacob Mumma Family", written by Ellen Landis Mumma in 1970.
His birth date is recorded as 26 May, 1869 on his tombstone.
Herald of Truth, September 15, 1898, page 285
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MUMMA.-On the 13th of Aug., 1898, at Landisville, Lancaster Co., Pa., after a day's illness of rheumatism of the heart, Bro. Isaac B. Mumma, aged 29 years, 2 months and 17 days. On the 13th inst. at five o'clock A. M. he said to his wife, "I must die if pains do not leave me." The doctor near by was summoned. After his arrival the brother said, "Doctor, I have to die." Then he said to those who were present, "Sing and pray for me, because I have to leave." Shortly afterward he fell into the sleep of death. The dear brother leaves a deeply bereaved widow (her maiden name was Shirk), also a father, two brothers and one sister to mourn his early departure; but they do not mourn as those who have no hope. On the 16th inst. his remains were taken ten miles east to their last resting place (beside those of his three small children who have gone before) in the cemetery near the Hess Mennonite M. H. Hiram Kauffman and J. W. Brubaker preached to a large congregation of friends and neighbors who met to pay their last tribute of respect. Text, John 9, latter part of fourth verse.