Vatican City, Jul 3, 2015 / 06:26 am (CNA/EWTN News).- With a sister who is a Doctor of the Church and parents set to be canonized in October, Leonia Martin could be the fourth member of her family declared a saint as her own cause for canonization officially opens.

Leonia is the sister of St. Therese of Lisieux and the third daughter of Blessed Louis and Zelia Martin, who are set to be the first couple ever to be canonized at the same ceremony, which will be held Oct. 18 in the Vatican.