Yes.

[No awareness of how weird this was. Well, actually, he knew it was kind of weird, but considering the other weirdness packaged into the Eisner Bloodline, he decided Jeralt being over three hundred years old due to a blood transfusion with a divine beast was the least weirdest thing about them.]

Well. Three hundred is an approximate... he admitted he stopped counting after that number. He's likely older.

[He thought about it for a moment.]

...definitely older.