How to Set Messages to Display Full Names on iPhone & iPad
The Messages app in some iOS versions defaults to shortening contacts names to only display their first name. That is done to make things look nice and tidy, and it also helps to prevent an overlap between the contact name and navigational elements on iPhone screens while avoiding name truncation. An obvious problem with this default setting reveals itself if you have contacts that share first names, which is probably just about everyone.
Because message windows from “Bob Jones” will look the same as “Bob McKowski” and both look like they’re from “Bob”, it becomes impossible to tell them apart from the message window itself (outside of reading the message contents, of course). That could potentially lead to an awkward situation where you inadvertently respond to the wrong text, or send something to the wrong person who just happens to share a name. Fortunately, preventing such a scenario is just an easy settings adjustment away, though it’s a little buried in the preferences.