Two little-known fields in iPhone contact cards are the Phonetic First and Last Names. Fill them in to help Siri understand your requests better and to keep Siri from mispronouncing the names of your friends and family.

To set a phonetic field just go to a contact’s entry from your iPhone, scroll to the bottom, and tap “Add Field”. From there you’ll find the fields you’re looking for.

iPhone’s Phonetic Name Fields