Nick away BasilBabyEater 
With regards to Engels His book on Victorain England was The Condition of the Working Class in England and was a critique of the industrial revolution's effect on the quality of life of the working class. He analysed the origin of the family in "The Origin of the Family, Private Property and the State". And both he and Marx analysed the organisation of the patriarchal family as being a miniature version and precursor of the state organisation (capitalism) which was to follow.
In this text he identifies the beginning of patriarchy (as we conceive of it) as originating in the change from mother right to father right as a result of inheritance customs concerning farming assets and paternal lines. Pages 63 to 66 of the pdf are the relevant sections.
On the death of the herd owner, therefore, his herds passed, first of all, to his brothers and sisters and to his sisters’ children or to the descendants of his mother’s sisters. His own children, however, were disinherited. Thus, as wealth increased, it, on the one hand, gave the man a more important status in the family than the woman, and, on the other hand, created a stimulus to utilise this strengthened position in order to overthrow the traditional order of inheritance in favour of his children. But this was impossible as long as descent according to mother right prevailed. This had, therefore, to be overthrown, and it was overthrown; and it was not so difficult to do this as it appears to us now. For this revolution — one of the most decisive ever experienced by mankind — need not have disturbed one single living member of a gens. All the members could remain what they were previously. The simple decision sufficed that in future the descendants of the male members should remain in the gens, but that those of the females were to be excluded from the gens and transferred to that of their father. The reckoning of descent through the female line and the right of inheritance through the mother were hereby overthrown and male lineage and right of inheritance from the father instituted. We know nothing as to how and when this revolution was effected among the civilised peoples. It falls entirely within prehistoric times. That it was actually effected is more than proved by the abundant traces of mother right which have been collected, especially by Bachofen.
The overthrow of mother right was the world-historic defeat of the female sex. The man seized the reins in the house also, the woman was degraded, enthralled, the slave of the man’s lust, a mere instrument for breeding children. This lowered position of women, especially manifest among the Greeks of the Heroic and still more of the Classical Age, has become gradually embellished and dissembled and, in part, clothed in a milder form, but by no means abolished. The first effect of the sole rule of the men that was now established is shown in the intermediate form of the family which now emerges, the patriarchal family.
He then quotes Marx - The modern family contains in embryo not only slavery (servitus) but serfdom also, since from the very beginning it is connected with agricultural services. It contains within itself in miniature all the antagonisms which later develop on a wide scale within society and its state. Such a form of the family shows the transition of the pairing family to monogamy. In order to guarantee the fidelity of the wife, that is, the paternity of the children, the woman is placed in the man’s absolute power; if he kills her, he is but exercising his right.