The name (REB) of the ship of Alexandria in which Paul sailed from Malta (Acts 28: 11) with these twin brothers (NRSV) as figurehead. In Greek mythology they were the sons of the god Zeus and brothers of Helen.
Citation for Castor and Pollux
Citation styles are based on the Chicago Manual of Style, 15th Ed., and the MLA Style Manual, 2nd Ed..
MLA
"Castor and Pollux." In A Dictionary of the Bible. Ed. W. R. F. Browning. Oxford Biblical Studies Online. May 22, 2013. <http://www.oxfordbiblicalcstudies.com/article/opr/t94/e358>.
Chicago
"Castor and Pollux." In A Dictionary of the Bible. , edited by W. R. F. Browning. Oxford Biblical Studies Online, http://www.oxfordbiblicalcstudies.com/article/opr/t94/e358 (accessed May 22, 2013).