Alizai is my family name, its a funny story that my grandfather (may he rest in peace) told me when I was younger, my ancestor I forgot what his name was from the Durrani tribe accompanied Dost Mohammad Khan Barakzai, but after Dost Mohammad was successful, he then executed my ancestor for fear that his power would grow more. I don't know how much this story is true, but I take it with a grain of salt today.
Ok. I knew a brother from the Alizai tribe from Hazro. I also know another brother from the Alizai tribe who is a journalist and manager for a Pashto newspaper. He has a friend in the Afghan Ministry who knows a lot about Pashtun tribes.