John Alexander was born in Wooler, Northumberland, son of country physician and surgeon James Alexander (1797–1863).[4] He was educated at the Royal High School, Edinburgh. Both his sisters married famous doctors: Christina Margaret (1833–1907) married Sir John Struthers, best known for his drawings of the beached Tay whale;[5] Margaret Agnes (1841–1911) married John Ivor Murray, who built a hospital in Shanghai and became Colonial Surgeon in Hong Kong.[6]
^Public Records Office 1841 Census HO 107/833/12 (parish of Wooler)
^"Sir John Struthers 1823–1899"(PDF). Living in the past. Dunfermline Heritage Community Projects. Archived from the original(PDF) on 29 October 2015. Retrieved 30 September 2012.