Did some poking around and what I learned, combined with help from a fellow poster on this msg board, leads me to believe that LeKander comes from Lekman, and Lekman means "layman," i.e. a non-ordained person.
Why someone would adopt Layman as a last name would be interesting to know. Suppose my ancestor was a deacon or something of the sort at his local church.
Oh, and I think it's interesting that the 'K' got capitalized at some point - perhaps to make the name look French? Oui, oui?