 When addressing a familiar person, names are shortened, most commonly by choosing one of the parts of the name and adding a vowel, melting it into one or adding the suffix "-ka".E.g., a woman named "Delgerzayaa" might be called "Delgree", "Zayaa" or "Deegii", a man named "Arslandorj" might become "Askaa", or his sister "Idertuyaa" could become "Idree", and so might her boyfriend "Iderbayar".In the Middle Ages, there were no patronymics, but clan names were sometimes used in a particular morphological form.