The Spanish word 'eñe' comes from the Latin word 'enne', which was the name of the letter N in Latin. In Spanish, this evolved to specifically refer to the letter Ñ, a distinctive character in the Spanish alphabet that represents the palatal nasal sound [ɲ]. This letter developed in medieval Spanish as a way to save space in manuscripts, where scribes would write a small n above a regular n to indicate the palatal sound, eventually leading to the tilde (~) we see today in Ñ.

While 'eñe' is a relatively unique word as it specifically names a letter, there are many common Spanish words that feature the letter ñ, such as 'año' (year), 'niño' (child), and 'señor' (mister/sir). The letter ñ is so fundamental to Spanish that Spain's basketball team is nicknamed 'ÑBA' (a play on NBA), and the letter is often used as a symbol of Spanish language and culture.

While English doesn't have a direct cognate for 'eñe' since it doesn't have the letter Ñ, the letter N in English comes from the same Latin letter name 'enne'. When English borrows Spanish words containing ñ, it typically either keeps the ñ (as in 'jalapeño') or replaces it with 'ny' (as in 'canyon' from Spanish 'cañón').