Did you know that Dijkstra's voice actor also voiced...... answers below.

Caleb Menge and Francis Bedlam.

Not only this, we have a few more examples of this:

Ves is also Fringilla Vigo and Tamara Strenger

Whoreson Junior is also Dudu and Vimme Vivaldi

Avallach is also Arnvald and Hjort, the druid who tries to help Udarlyk before Geralt's defeat the Hym.

Are you surprised with any of this, and do you know other examples like this from other main voice actors?