- John, 1809-1891 (my 2nd great grandfather)
- James, 1810-1891, not on the gravestone, but separately interred at the Church of St. John Milltown, Magherafelt.
- Joseph 1812-1831
- Francis 1815-1873
- Mary 1817 - 1905, not on gravestone, but connected via newspaper articles and census records; she died a spinster.
- Henry 1820 - 1889, not on gravestone, but he was a famous Redemptorist cleric and a nationalist firebrand, with multiple links back to the family.
- Elizabeth Harbison Hughes, ???-1896, referred to in a wedding announcement as William's youngest daughter, but birth date unknown.
- Michael (~1827 - 1865)
- Thomas II (1828-1858)
- Thomas I and David died in infancy
Most notably there is no William Jr.. It is mentioned on several occasions William was a modest man; nonetheless, it was the rule at the time that one son be a 'junior', and frankly, they had a relatively small number of names they used; they may have been running out. The other sons might have left home (there is room for 1 or maybe even 2 before John), and/or emigrated; or they might have died before death records were systematized about 1860.
Thomas was almost certainly the last child. Mary Donnolly would have been 47 by the time she was ready to conceive again, and she'd already given birth 14 times. William was certainly religious, and the child would therefore have been baptized. By 1830 most of the local churches at which he might have been baptized were keeping registers, though bad clerical handwriting, stains and fraying of the edges always mean a few baptisms are lost.
The other son or sons may be hard to find, though I have a couple of leads.