pluma

feather; quill, quill pen; pen, fountain pen; nib; ballpoint pen

From Latin plūma (“feather”), taken as an early semi-learned term (Latin pl- normally becomes ll- in inherited Spanish), or it may have maintained a conservative pronunciation as it would have been in use by mainly the upper class. A popular evolution of the word may have once existed in pre-literary Spanish, as evidenced by the Old Spanish derivative llumazo (compare Portuguese chumaço; see also Spanish chumacera, borrowed from a related Portuguese term). Cognate to English plume.