there isn't a patron saint i belive for determination its self, but to become a saint you need to show determination to remain holy and true to god so you could say that all saints are known for determination I suposse.
There are no saints of focus and determination, but there are several known for having focus and determination as traits.
Some examples:
Rita of Cascia: She wanted to be a nun, but instead she was married off to a violent and immoral man at the age of 12. He cheated on her and was abusing, but she held true to her beliefs. She kept influencing him, and eventually he converted and changed ways.
St. Jude: He is the patron saint of desperate situations, and wrote in a letter "...stresses that the faithful should persevere in the environment of harsh, difficult circumstances, just as their forefathers had done before them..."
The Patron Saint Index shows no patron saint of determination.
The best known patron saint of musicians is St. Cecilia.
St. Sylvester is not traditionally known as the patron saint of kidneys. He is actually known as the patron saint of woodcutters, and his feast day is celebrated on December 31st.
The best known patron saint of engineers is St. Patrick.
The patron saint of Confirmation is Saint Ambrose, who was a bishop known for his teachings on the sacraments and his strong defense of the faith. He is also known as the patron saint of learning and students.
The patron saint of drawing in the catholic religion seems to be Saint Amanda of Jerusalem. She was known for her myseterious sketches of spiritual happenings. Officially, the Patron Saint Index lists no patron saint of drawing.
I find no saint named Eva but Saint Eve of Dreux is not a patron saint. Little is known about her except that she was a martyr.
Some female Patron Saints are Saint Anne, the Patron Saint of grandmothers and mothers. Saint Brigid is the Patron Saint of newborns. Saint Cecile is the Patron Saint of musicians. Saint Barbara, Saint Dorothy, Saint Lucy, Saint Catherine, Saint Margaret, and Saint Anne are some of the most known female Saints.
Saint Brendan the Navigator is often considered the patron saint of explorers and sailors. He is known for his legendary sea voyages in the sixth century.
Saint Kentigern, also known as St. Mungo, is the patron saint of Glasgow, Scotland, and salmon.
Very little is known about St. Phoebe except that she may have been a deaconess in the early Church. She is, apparently, not a patron saint.
Please be specific as there are a number of saints named Elizabeth who are patron saints.
Ireland has a number of patron saint but the best known is Saint Patrick who is celebrated on March 17.