Looks as if the Irish chap was a widower ...
1823 Kirriemuir, Hendry (sic) Lowe marries Jean Tosh
1841 Henry Lowe, b. 1801, Ireland, Labourer Ag, East Roods, Kirriemuir with children Jannet and Mary, both aged 15, Ann, aged 10, Daniel, aged 8 and Edward aged 6
1851, Henry Lowe, b. 1803, Ireland, Stone Dyker, East Hillbank, Kirriemuir with children Janet, Ann, Daniel and Edward
1861, Henry Low, b. 1800, Ireland, Stone Dyker, East Roods, Kirriemuir, with children Janet and Ann
1871, Henry Low (Ancestry transcription of surname is 'Loner'), b. 1797, Ireland, Stone Dyker, Dudhope St, Dundee with children Janet, Ann, Edward
1879, death of Henry Lowe, aged 86, Dyker, Dudhope St, Dundee, widower of Jean McIntosh, next of kin son Daniel Lowe, 141 Wilkies Lane, Dundee. Parents were William Lowe, Tanner, and Mary Burns.
1881 census, Edward, Janet and Ann Lowe living at Dudhope St, Dundee
1891 census, Edward, Janet and Ann Lowe living in Dunnichen
1901 census, Edward Janet and Ann Lowe living in Dunnichen
1904, Janet dies, 1913, both Edward and Ann die