The only reference to his real name in your screenshot is the first entry, which is purple and removable because it is coming from your browser's session identity history. If this was in fact in an incognito tab, it's likely you had one or more incognito windows simultaneously open somewhere else where you had searched for him, which carried over into your new tab.
https://imgur.com/a/Ppj57cP
Note that there's no reference to his real name.
The only reference to his real name in your screenshot is the first entry, which is purple and removable because it is coming from your browser's session identity history. If this was in fact in an incognito tab, it's likely you had one or more incognito windows simultaneously open somewhere else where you had searched for him, which carried over into your new tab.