if u r talking about ancient times I think its cuz the son is the man of the family when they grow up. and when the daughter gets married im pretty sure they had to change their last name to their husbands family last name, and usually their kids last name would be the same as the husband's/father but thats what I think at least
You're right abt the family name. Son could pass the family name to his children while daughter hv to change their family name following their husband's. The 'end of bloodline' thing is common for ppl with family name like Chinese and Britain's ppl as their ancestor used to really seek for family's glory rather than individuality. But I don't think a lot of ppl care abt that nowadays. Mybe just some minorities
I know that this is from ancient times, but why do people think that having a daughter means the end of a bloodline? Is it bc they couldn't keep their names? Like, they share the same damn blood