It's difficult to know what Old Testament Saints are Patron of. Taken into account that she became ill at one point, during their 40 year wondering in the wilderness, she might be invoked against illness.
Clarification:
Old Testament personages are usually not accorded the title of 'saint' as that is usually reserved to the New Covenant saints. However, the name Miriam is the Hebrew for Mary and sometimes used to refer to her. For a list of the patronages of the Blessed Virgin Mary, see the link below.
The Patron Saint Inex lists no patron saints of bears.
Saint Lillian is not a patron saint as per the Patron Saint Index.
As per the Patron Saint Index, there is no patron saint of wrestlers. However, Saint Sebastian is the patron saint of all athletics and athletes.
A patron saint is supposed to be a protector in the Catholic religion. Patron Saint Angelico is the patron saint of artists. A patron saint is a protector of life.
As per the Patron Saint Index, Saint Cedd is not a patron saint at this time.
Saint David is not a patron saint of England. He is the patron saint of Wales.
The Patron Saint Index lists no patron saint of dinosaurs.
Babylas is a saint but not a patron saint.
Mellon is a saint but not a patron saint.
Saint Cocca is not a patron saint.
Saint Noel Chabanel is a saint but not a patron saint.
Saint Natalya is the patron saint of converts and martyrs.