Do the creatures entering the battlefield via Strefan, Maurer Progenitor's ability count as being cast?

Question

So this is the situation:

I used the ability of Strefan, Maurer Progenitor to put vampire cards onto the battlefield, sacrificing 2 blood tokens.

I use this to put Cordial Vampire in the battlefield.

Did I cast Cordial Vampire?

Answer 1

You did not cast him. Casting a spell is a particular process, described in rule 601, of putting a card onto the stack, paying its costs, and letting it resolve.