Annclare seems to have done quite a bit of work here, hopefully I can add a little:
Stephen McEllistrim was from Tralee, born 05 July 1840 to John McEllistrim & Julia Huggard.
Stephen McEllistrim from Tralee, Co. Kerry married Johanna Sullivan from Kilfalney, Killeentierna in Killeentierna parish church on 27 February 1876. They had 5 children born to them at Nelson Street, Tralee, Co. Kerry. Nelson Street was named after Admiral Nelson of the British Navy. After Ireland won independence in 1921, it was renamed Ashe Street after the Irish patriot Thomas Ashe. The four children were born as follows:
Julia McEllistrim born 14 January 1877
Garrett M. McEllistrim born 26 July 1878
Catherine McEllistrim born 26 July 1879
John McEllistrim born 03 November 1881
Stephen McEllistrim born 04 September 1883
We know that Julia married Isaiah Brooks in 1895 and they can be found on the 1901 Irish census in The Square, Tralee.
Garrett can be found at No. 25 Nelson Street where he is listed as a nephew of Michael & Julia Ryan(nee McEllistrim). His occupation is listed as railway clerk. The only other mention of Garrett is that he was eligible for a pension in the UK.
John received his naturalisation papers in Illinois, USA on 26 September 1906. He lists his date of immigration as 13 May 1899.
Stephen Jr. emigrated to the USA on 30 March 1901. He gave his age as 20 and said he was going to his mother at Douglas Boulevard, Chicago. She can be found on the 1900 US Census as "Joan McEllistrie", a single housekeeper at a pastors house on Douglas Boulevard. She lists her emigration as 1890. She can be found on the 1910 Census as Johanna Mcelistrum, again a housekeeper, this time listed as widowed. She died in Chicago on 02 September 1933.
Stephen Jr. married Gertrude Emily Jackson ON 21 April 1912 in Chicago, Illinois. They had at least 8 children: Catherine Marie, Steven, Mabel, Gertrude, Irene, Maryanne, Clare & Don. He became a naturalized American citizen on 19 February 1915 in Chicago Illinois. He gave his address as 5716 Union Avenue, Chicago. He worked as an engineer with the railway. Stephen Jr. died on 17 August 1967 in Los Angeles, California.