so called for Italian physician Bartolomeo Eustachio (d.1574), who discovered the passages from the ears to the throat. His name is from Latin Eustachius (see Eustace).
Entries linking to eustachian tube
Eustace
masc. proper name, from Old French Eustace (Modern French Eustache), from Latin Eustachius, probably from Greek eustakhos "fruitful," from eu "well, good" (see eu-) + stakhys "ear (of grain);" see spike (n.1).