This from Brides magazine (www.brides.com/why-do-women-take-husband-last-name-5116974):
“Coverture is a legal formation that held that no female person had a legal identity,” explains Allgor. “A female baby was covered by her father’s identity, and then, when she was married, by her husband’s.” Under coverture, a husband and wife became “one” under marriage. “It sounds romantic, but the ‘one’ was the husband,” Allgor continues. “She becomes, and this is the phrase, ‘legally dead.’ So it’s not that women take the last names of their husbands, which is how we think of it—it’s that they become part of [the husband’s] body. She does not exist in law, only the husband does.” Eerily enough, this is why characters in the Hulu series The Handmaid’s Tale are renamed things like “Offred” and “Ofglen” in the dystopian society of Gilead—these women are literally considered “of” the specific men that rule them.
Codified into written law by William Blackstone’s Commentaries on the Laws of England in 1765, coverture negated a female’s existence as an independent identity. As a result, her rights were severely limited. “Married women could not make contracts, because they couldn’t own businesses,” Allgor says. “Married women owned nothing—not even the clothes on their backs. They had no rights to their children, and no rights to their bodies, so men could send their wives out to labor, and [the men] could collect the wages. He also had an absolute right to sexual access. Within marriage, a woman’s consent was implied, so rape was legitimate.”
While not always put fully into practice in real life—“You can’t really run a society where women are this oppressed,” Allgor notes—these customs carried over from England to America during the establishment of the colonies. Though there were opportunities to formally abolish or amend coverture during the creation of the U.S. Constitution in the 1780s—Abigail Adams addressed the very matter in her “Remember the Ladies” letter to her husband, Constitutional Convention member John Adams—the first break in coverture the U.S. didn’t arrive until the Married Women’s Property Act of 1848.
According to wikipedia, in the UK: Coverture was first substantially modified by late-19th-century Married Women's Property Acts passed in various common-law jurisdictions, and was weakened and eventually eliminated by later reforms.
That does sound pretty patriarchal to me! Thank god we don't live like that anymore.
More on coverture here: digpodcast.org/2018/02/25/coverture/