If you want to allocate different ringtones to different people then it’s very easy. On your iPhone go to the Contacts app, select your person, then tap the Edit option in the top right corner. This brings up the option for Ringtone, which will most likely be set to Default at the moment. Tap on this and the full menu will appear, allowing you to select whichever one you deem appropriate. Now whenever that person rings you’ll know their name by the sweet sounds they make.