HECU Grunts in early chapters such as We’ve Got Hostiles use lines like “It’s Freeman! Get him!” “Squad, get Freeman!”
It doesn’t make a lot of sense. It should only happen in later chapters, after On A Rail where they know Freeman’s name. When they have been tracking Freeman and know that he’s killed lots of grunts.
In Half-Life it wasn’t until On A Rail when you discover they have written messages on the wall.