From *ladre, itself from Latin later (“brick”), + -iello.
ladriello m (plural ladriellos)
- brick
c. 1250, Alfonso X, Lapidario, f. 77v:La una que es de ladriellos q̃mados de que no conuiene que fablemos ⁊ la otra es de minera de que q̃remos fablar en eſte libro.- One, which comes from burnt bricks, we will not speak of; but the other, which comes from a mine, we want to speak of in this book.