1826- George Mann, John and Barbara's son, dies leaving his widow, Margaret Pearson Mann, to raise their children Abel and Ruth.
1828- John Mann Jr. and Barbara Mann sell their farm in Miami County, Ohio and move to Loramie Township, in Shelby County, Ohio.
1831- Barbara, John's second wife dies.
1832- John Mann Jr. marries Rachael Berry.
1833- John Mann Jr. dies in the latter part of May. (John and Barbara’s son, Isaac, donated land for a cemetery and church in Oran after his brother George's death. It is likely that he, John, Barbara, and Rachel Mann are buried there in near John and Barbara's son, Isaac.)
1833- The Executors notice of Col. John Mann's death was placed in the Piqua Gazette, dated 13 July.
1833- After his death, his youngest daughter, Cynthia Ann, is born to his widow Rachel.
1833- Probate Court, Shelby County, Ohio. Estate package A78 is filed for John Mann. These records show no mention of his deceased son George. All other children are mentioned.
1834- The Estate Executor of Col. John Mann's estate files suit against John's widow, Rachel Berry Mann, seeking land to be sold to satisfy debts. The land she inherited is improperly identified and it is not discovered until after Rachel's death.
1835- Ruth and Abel Mann file suit against John and Barbara's youngest son, Charles. Charles had been entrusted by John Mann with provision for their father's share of inheritance.
1851- On April 1, John's widow Rachel dies.
1853- Eleazar Hathaway, the executor of John Mann's estate, petitions the Common Pleas Court to obtain a signature from Cynthia Mann, Rachel's sole heir, to clear the deed to the improperly identified land. At this time, Cynthia is living in Mahaska County, Iowa.
1853- John's eldest daughter, Frances Mann Skillen, sues John Mann's estate for $1000, claiming she provided domestic duties such as cooking, cleaning, laundry and shopping between the time her mother Barbara died and the time he remarried Rachel, and that John stated he would pay her.