The Spanish word 'mando' (meaning 'command') comes from the Latin word 'mandare', which meant 'to entrust' or 'to command'. Interestingly, 'mandare' itself is a combination of two Latin words: 'manus' meaning 'hand' and 'dare' meaning 'to give'. So literally, the original concept was about 'giving into someone's hands' or 'entrusting something to someone's care', which evolved to mean giving orders or commanding.

Some common related Spanish words include 'mandar' (to command or to send), which is the verb form of 'mando'. You might also encounter 'mandato' (mandate), 'mandamiento' (commandment), and 'mandatorio' (mandatory) - all of these words share the same root and relate to the concept of commanding or ordering.

In English, we have several words that come from the same Latin root 'mandare'. These include 'mandate' (an official order), 'mandatory' (required), 'command', and 'demand'. You can see how all these English words retain the core meaning of giving orders or requiring something. The word 'remand' (to send back, especially into custody) also shares this origin.