There are at least 4 saints named Zoticus. All were pre-congregational. They lived in the early centuries of the Church before a formal process for canonization existed. Saints were "canonized" by popular acclamation, usually with the approval of their bishop. The formal process for canonization did not start until the 12th century.
Saint Zoticus of Constantinople was not canonized as the official system of canonization was not in place at the time. He was declared a saint by the early Church based on his martyrdom about the year 350 AD.
Pius XI is not yet a canonized saint.
St. Bridget of Sweden as canonized on October 7, 1391, by Pope Boniface IX. St. Bridget of Ireland is a precongregational saint and was never canonized.
St. Anthony of Padua was canonized as a saint in 1232, less than a year after his death.
St. John Fisher was canonized in 1935 by Pope Pius XI.
Saint Joseph de Veuster, St. Damien of Molokai, was canonized October 11, 2009.
St. David of Wales was canonized in the year 1120 by Pope Callistus II.
St. Anselm was canonized in 1494.
No, Saint Patrick was never formally canonized
Saint Rose of Lima was the first saint from the Americas to be canonized,The first person born in the Americas to be canonized as a saint was St. Rose of Lima. The first person born in the United States to be canonized as a saint was St. Elizabeth Ann Seton.
Francis was canonized on July 16, 1228, by Pope Gregory IX.
Saint Peregrine Laziosi was canonized on December 27, 1726, by Pope Benedict XIII.