Complex sentence: In 1885 Doyle married Louisa (sometimes called "Touie") Hawkins, the youngest daughter of J. Hawkins, of Minsterworth, Gloucestershire, and sister of one of Doyle's patients.
Split into simpler sentences: In 1885 Doyle married Louisa (sometimes called "Touie") Hawkins. She was the youngest daughter of J. Hawkins, of Minsterworth, Gloucestershire, and the sister of one of Doyle's patients.