French Colonial Lower Canada has laws about maximums before marriage, rather than minimums. You'd need to pay a surtax if you were not married by that point. They were desperate for the population growth. I believe it was 16 for women, 18 for men, though, so certainly not this literal infant nonsense, though you could reasonably expect the marriage to occur earlier than the latest tax deadline, I suppose.

If you're looking for younger examples, in Romeo And Juliet, Juliet "Had not yet seen fourteen summers", as per her father in the play, but was being put to an arranged marriage situation. Another character chastizes him for letting her get that old, implying the marriage age should have been younger, and a lack of pushback in the narrative to that idea implies it would have been at least somewhat acceptable to audiences at the time.

All this stated, in colonial Canada, they thought the best way to cure an infection was leeches and cocaine, and if that failed, amputation. And Shakespearian medical science started and stopped with "have you tried more powdered lead infused heroin?", so while there are indeed historical examples of a society's norms being quite different than ours on a sexual health basis, those norms are ALSO rather barbaric in the rest of their health sciences, and you should look back on those societal views with bemused castigation, not idolatry.