Alec probably knew Shepard so they would then know him through their father.

Yeah but i mean because of the audiolog where you can Shepard did they know him/her in person

And his Crew

What audiolog?

Forget it though was the right game. I first thought that you could hear after Ryders family secret a log where Shepard speaks with Ryder

I don't think so

Wdym

@Shadow Freddy 544 no I was answering the question of this post about if Shepard met the Ryder twins