Royal Skousen argues that "thy families" at Ether 1:41 is in error; it should read instead "thy family."
Royal Skousen, "Changes in The Book of Mormon," Interpreter: A Journal of Latter-day Saint Faith and Scholarship 11 (2014): 171–172
The last chestnut deals with the question of whether the brother of Jared was a polygamist. The plural reading is still in our current text for Ether 1:41, where the Lord, in speaking to the brother of Jared, refers to “thy families”. The original text, as found in the printer’s manuscript, basically reads that the brother of Jared had a family and Jared had a family, and that the brother of Jared had friends, each one with a family, and Jared also had friends, each one also with a family. The 1830 typesetter apparently let his eye glance down to the next manuscript line, with the result that he accidentally set thy family in the plural, as thy families. In other words, the plural reading for the brother of Jared is just a typo by the 1830 typesetter. The really sad aspect about this is that when the Church changes the reading back to the singular, there will be this outrage, this claim – absolutely false – that the Brethren are doing this in an attempt to remove polygamy from the text. This is perhaps one advantage for having an independent scholarly approach to the text of the Book of Mormon. The evidence is very clear that the actual text refers to the brother of Jared and his family – in the singular, not the plural.