Even in 2012, virtual assistants aren’t so hot when it comes to pronunciation. Luckily, contacts in the Address Book are built to include phonetics so Siri has an easier time figuring out exactly who you want to call or text.
First, click on the contact you think Siri needs some clarification on, and tap Edit. Scroll down and hit Add Field, and a menu should come up that includes Phonetic First Name and Phonetic Last Name. Type in whatever you think is appropriate, and make it clear – only one wrong vowel will throw Siri off. (The name Megan, for example, has various pronunciations including MAY-guhn, MEH-guhn, and MEE-gun.)