le

to him, for him; dative of él; to her, for her; dative of ella; to it, for it; dative of ello; to you, for you (formal); dative of usted; you (formal); accusative of usted (proscribed when used with feminine objects)

“Mi mamá va a escribirle una carta.” — My mom is going to write him a letter.

From Latin illī, dative of ille.

to them, for them (singular); dative of elle; to them, for them (singular); accusative of elle

“Le diré que te llame.” — I will tell them to call you.

From Latin illī, dative of ille.