Two half brothers, same mother, different fathers .. Two generations later, how distantly or closely related would make relationship today?
If the two brothers have the same mother, then they are still united two generations down the line. Their families would still consider each other relatives even today. Blood ties are not usually destroyed even across generations.
If were going by exact way, im an only child. If were going with half-brother and step-brother stuff i've got 6 brothers and one sister. That stuff doesnt matter.