Caystrius
Καΰστριος
(Καΰστριος), a son of Achilles and the Amazon Penthesileia, from whom the river Caystrus was believed to have derived its name. Caystrius, together with Asius, had a heroum on the banks of that river. (Strab. xiv. p.650; Serv. ad Aen. 11.661.)
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.