Origin: 1825–35; < Sp madrileño, perh. by dissimilation (d—d > d—l) from *madrideño, equiv. to MadridMadrid+ -eño suffix of appurtenance (< L -ignus, -egnus, appar. extracted from adjs. formed with -n- in which g was part of the root, e.g., larignus of larch, salignus of willow)
[mad-ruh-leyn-yoh; Sp. mah-th
ree-le-nyaw] 