Easton's Bible Dictionary (1897)
The name adopted from the Babylonians by the Jews after the Captivity for the third civil, or ninth ecclesiastical, month (Neh. 1:1; Zech. 7:1). It corresponds nearly with the moon in November.
Smith's Bible Dictionary (1863)
[Month]
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
CHIS'LEU . See Months.
Hitchcock's Bible Names (1869)
Cisleu, Casleu, rashness; confidence