The name Tessie is a diminutive form of Theresa, which itself is derived from the Greek name Θερεσα (Theresa), meaning 'to harvest'. It is often used as a nickname or affectionate form for names like Esther, Tess, and Theresa/Teresa. The name gained cultural significance through its association with the Boston Red Sox and the 2004 song by Dropkick Murphys, which recounts its historical use by the Royal Rooters fan club to support the team.