Matron was a title and a job found on Earth and other human-based planets. A matron was the most senior nurse in a medical group.
In 1913, Joan Redfern was the matron of Farringham School for Boys. (TV: Human Nature, The Family of Blood)
In 1970s England, a matron worked at Brendon Public School, where Vislor Turlough attended. (TV: Mawdryn Undead)
When she arrived on Earth in the early 21st century, Cofelia, or "Miss Foster", was the matron and nanny of Five-Straighten Classabindi Nursery Fleet. (TV: Partners in Crime)
After Earth was destroyed and humans went on to live on the New Earth, the Catkind Casp got the degree of matron of the Sisters of Plenitude and the New New York Hospital. (TV: New Earth)