Here are a few examples:
* Saint Agatha of Sicily: Patron saint of fire victims, breast cancer patients, and brewers (often associated with beauty and health).
* Saint Dymphna: Patron saint of mental illness and neurological disorders, which can sometimes affect hair growth and health.
* Saint Lucy: Patron saint of eye health and vision, which can be linked to hair loss in some cases.
Ultimately, the concept of a patron saint for hair is more of a metaphorical idea than a strictly defined religious practice. Many people may find personal significance in associating certain saints with aspects of their life, including their hair.