| Born | Ballyshannon - 2nd June 1831 |
| Married | (1) St George's Church, Montreal - 9th December 1856 (2) St Peter's Church, Dublin - 1st June 1876 |
| Died | Stonewold, Ballyshannon - 31st May 1914 |
| Burial | St Anne's Church, Ballyshannon |
Of "Stonewold, Ballyshannon, Co. Donegal, Ireland". Educated at Trinity College Dublin (Dublin University), gaining BA in 1852 and MA in 1869. He was Professor of Engineering at TCD from 1882-1887, having earlier been Professor of Road & Railway Engineering in the University at Montreal (M'Gill College). He was a JP for County Donegal and High Sheriff of that county in 1894. He is the author of the family history The Crawfords of Donegal published in 1886, with a second edition in 1897.
| Children | (1) James Samuel (dii), Robert Karl, Ernest Caldwell, Duncan John (dii), William Saunders, Henry Arthur, Alice Emily, Emma Mary. (2) Thomas Troubridge, Alfred, Edward & Frederick (twins). |
| Spouse | (1) Emily Sarah Crawford (1838-1870) (2) Anna Stubbs (?-1880) |
| Siblings | John Duncan (1824-1871), Sarah Emily (1826-1883), David (1827-?) |
| Parents | Samuel Crawford (1795-1881), Margaret Duncan (1799-1876) |