The origin of USTED

The personal pronoun we have for formal treatment comes from the polite expression VUESTRA MERCED (“Your Worship”) which changed through the centuries until became USTED.

This phonetic evolution was: 
 

VUESTRA MERCED > VUESA MERCED > VUESARCED > VUESANCED > VOACÉ, VUCÉ, VUSTED > USTED

The verbal form HAY

The verbal form HAY is the result of the contraction of the verb HABER in third person + the adverb AHÍ.

"RECORDAR" Etymology

           COR, CORDIS means “heart” in Latin. From there comes the Spanish noun CORAZÓN, of course, but also the verb RECORDAR (“to remember”).

           So, if you remember something in Spanish, you are basically doing it with your heart.