Two sons were born to Eber: One was named Peleg, because in his time the earth was divided; his brother was named Joktan.
NIV
To Eber were born two sons: the name of the one was Peleg, because in his days [the population of] the earth was divided [according to its languages], and his brother's name was Joktan.
AMP
And unto Eber were born two sons: the name of the one was Peleg; because in his days the earth was divided: and his brother's name was Joktan.
KJV