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Titus 3:9 tells us there’s no need to keep going after endless genealogies that are under the law which prove to be unprofitable and done in vain.
Our inheritance is found in belonging to God who has set us free from the Law. Faith in Him comes from hearing as it says in Romans, and not our own works.
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Mormon Doctrine, p. 71 “Book of the Law of God…records kept by the Church showing the names, genealogies, and faith and works of those to be remembered by the Lord in the day when eternal inheritances are bestowed upon the obedient are, taken collectively called the book of the law of God. Such records contain both the law of God and the names of those who keep that law. They are in effect a church book of remembrance. (D. & C. 85.)” – Bruce McConkie