Khair, Goodness, moral or physical; anything that is good, real or ideal, actual or potential. KhairAllah, the Goodness of Allah. Khiyaar, applied as an epithet to a sing. n., you say Jamal Khiyaar, meaning, An Excellent Camel.
-Lane’s Lexicon
I always knew that the first part of KhairAllah’s name would be given special treatment by Lane, seven columns of idioms, usages, and proverbs- such as, How Good is Milk for the Diseased, or, Mayest thou Meet with Good, or, By the Life of thy Good Father. And to the cognate word Khiyaar used in the construction of epithets, Lane gives the additional meaning, Cucumber, which made for the most Excellent eating when we finally reached the Nile.