Dorothy Day is not yet a saint so has no patronages.
Actually, St. Dorothy was removed from the Roman Calendar and had her cult suppressed in 1969 because so much that was known about her was based on legend and not fact. However, she is still listed as the patron saint of:brewersbridesfloristsgardenersmidwivesnewlywedsPescia, Italy
The process of canonization of Dorothy Day has only begun. She is not yet a saint.
Saint Marcella is Patron of Noblewomen. The Feast Day of Saint Marcella is January 31.
Your primary patron saint is the saint for whom you are named. A secondary patron saint would be the saint whose feast day is celebrated on your birthday.
England's patron saint is St. George, who is commemorated on April 23rd.
St. Michael the Archangel is a patron saint of grocers.
St. Andrew the Apostle is one of several patron saints of Scotland and his feast day is November 30.
St. David is the patron saint of Wales, much like Saint Patrick is the patron saint of Ireland.
There is no saint named Ashleigh. Your other patron saint would be the saint whose feast day falls on your birthday.
I can find no reference to a St. Colin. However, there was a Saint Collen whose feast day is May 21. He is not a patron saint.
The feast of Saint Andrew, a patron saint of Scotland, is observed on November 30.
The patron saint of garage workers happens to have his feast day today, December 1 - Saint Eligius.