The five lords of the Philistines: see verse 12 and also the comments on 5.8. Apparently the Philistine chieftains followed the wagon carrying the Covenant Box.

Ekron: see 5.10.

Quoted with permission from Omanson, Roger L. and Ellington, John E. A Handbook on the First and Second Books of Samuel, Volume 1. (UBS Helps for Translators). New York: UBS, 2001. For this and other handbooks for translators see here .