It appears that there never was a formal canonization process for St. Poppo but his name was somehow inserted into the Roman Martyrology by someone soon after his death. His name was left as is since it was felt he probably deserved the honor.
Yes, St. Poppo, a Benedictine monk, was canonized and is venerated as a saint in the Catholic Church. He is celebrated on January 25th.
St. Francis Xavier was canonized with fellow missionary St. Ignatius in 1622.
St. Eligius was canonized in the Pre-Congregation era. This was when people were often canonized because of their popularity while they were alive.
St. Etheldreda was canonized by Pope Celestine III in 1198.
St. Anselm was canonized in 1494.
Poppo of Treffen died in 1045.
The five canonized saints are St. Francis of Assisi, St. Therese of Lisieux, St. Teresa of Avila, St. John Paul II, and St. Mother Teresa.
Poppo of Stavelot was born in 977.
Poppo von Osterna died in 1257.
No, Saint Patrick was never formally canonized
Yes, St. Odilia was canonized. She is known as a patron saint of the blind and visual difficulties.
St. Clare of Assisi was canonized on September 26, 1255, by Pope Alexander IV.
St Martha was never formally canonized by the Catholic Church. She is recognized as a saint based on tradition and popular veneration.