John Byers (1797-1878) and Margaret Sturgeon (1805-1879) had:
Jane c1830-?
Mary Anne 1835-1928
John 1837-1906
Daniel 1839-1930
Eliza 1840-?
William 1847-1923
Rachel 1848-1886
Frances 1850-?
I have DNA matches to descendants of Mary Anne and Daniel. Mary Anne, Daniel, William and Rachel emigrated to Ontario, Canada, and I found Margaret's name from their death certificates. They all married in Tirmadown, which is where John and Margaret died (I have their death certificates). John Jr died in Fermoyle in 1906, I've contacted a couple of his descendants too.