The only free and comprehensive online etymological dictionary of the Spanish language
hoja f. (Noun) "page," "sheet of paper"
Old Spanish foja. From Latin folia "leaves." Originally a neuter plural noun (sing. folium) but reanalyzed as a feminine singular on the basis of the -a ending. From Proto-Italic *folio- "leaf." From Proto-Indo-European *dholH-i̯o- 'id.'
Also the origin of the surnames Hojo, Hojas, Hojeda, and Hojedo.
Indo-European
Romance
Asturian fueya, Portuguese folha, Galician folla, Catalan fulla, French feuille, Italian foglia, Aromanian foalji, Romanian foaie, Sardinian fógiu
Celtic
Gaulish pempe-doula "Pontentilla" (lit. 'five-leaves'), Middle Irish duilne "leaf," Middle Welsh deil "foliage," Old Breton dol "leaves," Old Cornish delen "leaf"
Germanic
Old English dile "dill" (English dill)
Albanian
Albanian dal "I emerge"
Hellenic
Ancient Greek θάλος (thálos) "sprout"
Armenian
Armenian dalar "green"