Petronella of Coutrai (Petronille) (? — after 1214) was a medieval noble lady.
She was a daughter of a woman named Sarah and her husband, lord Roger I of Courtrai.
Petronella was a wife of Lord Zeger II and with him, mother of:
Zeger III of Ghent
Gilles (he was married and he fathered a son named Arnold)
Her husband Zeger II was a templar from 1200 and in 1202 he died, and she continued as regent for their son Zeger. She remained influential after her son took over the government and donated some lands to an abbey. When signing documents she used the titulature of Burgravine.