
(from the article `Pergamum`) ...of Antiochus I (263 ); when he died in 241 he was succeeded by his nephew Attalus I, who defeated the Galatians and assumed the royal title; the ... ...weakness of the Seleucid kingdom to further expand his influence. He broke the power of the Galatians in two battles before 230, adopted the title ... ...
Found on
http://www.britannica.com/eb/a-z/a/121

any of a line of kings, usually named Attalus orEumenes, that ruled Pergamum, in Asia Minor, 282–133b.c.
Found on
https://www.infoplease.com/dictionary/attalid
No exact match found.