It is likely that Daniel's family, from the townland of Caheraveelane (near the village of Nad or Nadd) in Co. Cork, is connected to my Caheraveelane Sullivans (my Sullivans left Caheraveelane around the mid-19th century, settling in Mourneabbey, Co. Cork, and a descendant of Daniel's, who still lives in Caheraveelane, recalls his father talking about Sullivan relatives in Mourneabbey). However, I have been unable to determine the exact relationship between the two families, although I think it possible that Daniel may have been a brother of my great-great-grandfather Seamus Sullivan.
It is likely that Daniel was also related to a Thomas Sullivan who, according to the Tithe Applotment records of 1823, occupied 16 acres of land at that time in Caheraveelane. Could Thomas have been the father or a brother of Daniel's?
Note on Caheraveelane (also spelled Caheravellane and often shortened to Caher): the townland comprises 234 acres of mostly mountainous land and, as evidenced by summaries from the 1841 to 1891 censuses of Ireland, it was very sparsely populated in those years. Details - from www.eppi.ac.uk, the EPPI (Enhanced Parliamentary Papers on Ireland, 1801-1922) website - are as follows:
Year Inhabited Population
1841 2 15
1851 3 16
1861 2 15 (8 male, 7 female)
1871 2 10 (7 male, 3 female)
1881 2 14 (10 male, 4 female)
1891 3 23 (17 male, 6 female)
The increase in population between 1881 and 1891 can most likely be attributed to the births of several children in that decade within the families of Daniel's sons, Thomas and Daniel.
No details from the above households are available as the census returns from these years no longer exist. The 1901 census shows three families in Caheraveelane, two Sullivan and one Murphy) and the 1911 census shows only two households in Caheraveelane (each with seven individuals listed), headed by Thomas and by Hannah, Daniel's widow. The Murphy family is not listed.
I have been told that Sonia O'Sullivan, the well-known Irish athlete, is a descendant of Daniel. I have read, however, that Sonia's O'Sullivan grandfather was born in Dublin. Any information on where her O'Sullivan great-grandfather was from would therefore be most welcome. Interestingly, several other descendants of this Sullivan family (known historically as the Caher Sullivans) have been talented sportspeople, e.g., Arthur Sullivan (born in 1884 in Caheraveelane), a fine distance runner who competed internationally; Jerry O'Sullivan (from a related Sullivan family) who enjoyed success in boxing in Britain prior to emigrating to Australia; and Jerry's brother Eugene (1927-1967), a distance runner who was selected to represent Australia at the 1956 Olympics (but who did not in fact compete in the Games).