Add your family to Contacts
Start with yourself
You should start by making sure your own details are up to date and correct. Tap on Contacts, and find your name in the sidebar on the left. Now make sure your name, phone number, and email information are present and correct. If you want Siri to call you something other than your first name, you can pick a nickname by tapping Add Field > Nickname.
Add your family
Next you should make sure all of your immediate family is listed in the Contacts app. If you need to add a person, tap the Add (’+’) icon and enter their first and last name, then their email address and any other information you have. Siri and Contacts look much better using images, so tap Add Photo > Choose Photo and pick an image from the Camera Roll.
Tell Siri who you are
Finally you need to make sure Siri knows who you are. Tap on Settings > Siri > My Info and choose your own name from the Contacts list. Siri now responds to you by name. Test that this has worked by holding the Home button and saying to Siri “Who am I?” Siri now responds to you by either your first name or the nickname you chose earlier.