Short for ADELANTADO.

1

1602.  Middleton, Blurt, IV. iii. G 1 b. Your Lantedoes nor your Lanteeroes cannot serue your turne.

2

1633.  T. Stafford, Pac. Hib., II. iii. (1810), 255. They reported that the Lantado wished rather his person then the Ship.

3