Of the children of Simeon, by their generations, after their families, by the house of their fathers, those that were numbered of them, according to the number of the names, by their polls, every male from twenty years old and upward, all that were able to go forth to war;
This verse is about counting the men from the Simeon family who were 20 years or older and capable of fighting in wars. It lists them based on generations, families, and their fathers' houses, considering each male individually.