New International Version
From the descendants of Reuben the firstborn son of Israel: All the men twenty years old or more who were able to serve in the army were listed by name, one by one, according to the records of their clans and families.

American Standard Version
And the children of Reuben, Israel's first-born, their generations, by their families, by their fathers houses, 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;

Berean Study Bible
From the sons of Reuben, the firstborn of Israel, according to the records of their clans and families, counting one by one the names of every male twenty years of age or older who could serve in the army,

Douay-Rheims Bible
Of Ruben the eldest son of Israel, by their generations and families and houses and names of every head, all that were of the male sex, from twenty years old and upward, that were able to go forth to war,

English Revised Version
And the children of Reuben, Israel's firstborn, their generations, by their families, by their fathers' houses, 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;

King James Bible
And the children of Reuben, Israel's eldest son, by their generations, after their families, by the house of their fathers, 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;

World English Bible
The children of Reuben, Israel's firstborn, their generations, by their families, by their fathers' houses, according to the number of the names, one by one, every male from twenty years old and upward, all who were able to go out to war;

Young's Literal Translation
And the sons of Reuben, Israel's first-born -- their births, by their families, by the house of their fathers, in the number of names, by their polls, every male from a son of twenty years and upward, every one going out to the host --

Numbers 1:20 Additional Translations ...