The Spanish word 'jordano' meaning 'Jordanian' comes from combining two elements: 'Jordán' (Jordan) and the suffix '-ano'. The base word 'Jordán' comes from Latin 'Iordanes', referring to the Jordan River. The suffix '-ano' is commonly used in Spanish to create demonyms (words for people from a particular place).

This formation follows a common pattern in Spanish where geographical names combine with '-ano' to create terms for people from that region, similar to how English uses '-ian' (as in 'Jordan' → 'Jordanian').

A simpler related Spanish word is 'Jordán', which directly refers to the Jordan River. This geographical name is well-known in both religious and historical contexts.

The English word 'Jordan' is closely related, coming from the same Latin source 'Iordanes'. The English demonym 'Jordanian' follows a parallel formation to the Spanish 'jordano', though it uses the suffix '-ian' instead of '-ano'.