He was son of Lorenzo de Errázuriz y Vergara and Micaela Larrain y Cordova, both of Navarra.
[2] In 1733 he came to Lima, Peru and 1735 to Chile by his uncle 'Santiago Larraín', which had been eradicated and was a prosperous merchant overseas.
iii) José Antonio de Errázuriz Madariaga born on September 14, 1747, he was priest .
iv) Francisca de Errázuriz Madariaga born in 1748, she died very young.
x) María Loreto de Errázuriz Madariaga born in 1760, she died very young .