I will post in case any connection comes to light:
I descend from John Cashen, b. 1848 in Tipperary. His father was also John. He appears in the census return of 1871 living in Derry Street, Pancras, London. He married Mary Luddy and they had ten children:
Elizabeth, b: 1872
Thomas, b: 1875
Ellen, b: 1877
John, b: 1878
Lizzie, b: 1881
Mary, b: 1884
Alice, b: 1885
Winifred, b: 1887
Catherine, b: 1889
William, b: 1892
Regards,
Stuart