St. Dymphna was killed in the year 650, and was only around 15 years old.
There is no patron saint of emotional difficulties or problems but St. Jude is the patron of difficult situations.
Roman Catholic AnswerSt. Dympha is patron for the mentally ill, St. Drogo of the deaf, ill, deformed, St. Giles is patron for the disabled, St. Nicholad of Myra, St. Raymond Nonnatus, and St. Nicholas of Tolentino for children. The below link is for all the patron saints for the handicapped.
Saint Oda died in 726.
Saint Non died in 5##.
Saint Menas died in 309.
Saint Anastasija died in 1199.
Saint Fabiola died in 399.
Saint Philotheos died in 1380.
Saint Ponticus died in 177.
Saint Roderick died in 857.
Saint Acacius died in 3##.
Saint Marcella died in 410.