Old John Gill has an interesting comment of this ending to the Book of Job..
Job 42:13
He had also seven sons, and three daughters. The same number of children, and of the same sort he had before, Job 1:2; and according to Nachman the very same he had before, which the additional letter in the word “seven” is with him the notification of; so that the doubting of what he had before, Job 42:10; respects only his substance, and particularly his cattle; though the Targum says he had fourteen sons, and so Jarchi (t); others think these may be said to be double to Job in their good qualities, external and internal, in their dispositions, virtues, and graces; and others, inasmuch as his former children were not lost, but lived with God, and would live for ever, they might now be said to be double; and so they consider this as a proof of the immortality of the soul, and of the resurrection of the body; but these senses are not to be trusted to; whether these children were by a former wife or another is uncertain.
(t) Vid. Balmes. Gram. Strat. 26.
And the daughters were special enough to be mentioned by name, though the sons were not.
Job 42:14 And he called the name of the first, Jemima; and the name of the second, Kezia; and the name of the third, Kerenhappuch.
Job 42:15 And in all the land were no women found so fair as the daughters of Job: and their father gave them inheritance among their brethren.
Rainbow Trout 