Daniel Jennings was born in Francis Street, Dundalk in 1830. He was the eldest son of Patrick and Anne Jennings. He was baptised in Dundalk on the 17th of August 1830 and named after his paternal grandfather Daniel Jennings who had died in Newry, County Down, three months earlier. His baptismal sponsors were James Carroll and Catherine Coleman.
He attended Clongowes Wood College in County Kildare from 1841 to 1843 and again from 1846 to 1847. The reason for his absence from 1843 to 1846 is not recorded, but it may have been due to ill health. More information about Daniel might possibly be found in the Clongowes Wood College Archives, but these cannot be accessed at present due to Covid-19.
Daniel died in 1847.
On Saturday night, in the 17th year of his age, Mr. Daniel Jennings, son of Patrick Jennings, Esq., Francis Street, Dundalk.
 Newry Telegraph 7th October 1847
 Archivist Clongowes Wood College 15th September 2020