The Spanish word 'doblado' (meaning 'folded' or 'doubled') comes from the Spanish verb 'doblar' meaning 'to fold' or 'to double'. This verb traces back to the Latin verb 'duplare' meaning 'to double', which itself was derived from the Latin adjective 'duplus' meaning 'double'. The evolution from Latin to Spanish shows typical sound changes, where the Latin 'pl' cluster evolved into Spanish 'bl', and the 'u' shifted to 'o'.

Some common related Spanish words include 'doble' (double), 'doblez' (fold or crease), and 'doblegar' (to bend or fold). All these words share the basic concept of doubling or folding from the same Latin root.

English speakers might recognize the connection to words like 'double', 'duplicate', and 'duplex', which all come from the same Latin root 'duplus'. While the Spanish words emphasize the physical action of folding or bending, the English relatives tend to focus more on the numerical concept of 'two' or 'twice'.