Definition of "patron saint"

When Aimé Humbert joined Josephine in Paris, he visited the Inspector of Police, and was so depressed by his meeting that she sent him to the Louvre ‘to look at the wonderful painting of St Marguerite, the patron saint of purity, trampling down the hideous dragon and looking so calm and peaceful’.

2014, Helen Mathers, Patron Saint of Prostitutes: Josephine Butler and a Victorian Scandal‎, History Press

My patron saint, St. John of Shanghai and San Francisco—also known as “St. John the Wonderworker”—is particularly noteworthy in this regard […]

2016 July 8, Wesley J. Smith, “St. John the Wonderworker”, in First Things‎

Entering the tunnel, we pass a small shrine above our heads which contains a statue of St Barbara, the patron saint of tunnellers. It is traditional to have such shrines on every tunnel site.

2022 March 23, Paul Bigland, “HS2 is just 'passing through'”, in RAIL, number 953, page 41