I'm sorry if this doesn't help but from what stories are those families from? I like reading stories that are family based too.
https://www.mangago.me/read-manga/if_you_touch_my_brother_you_re_all_dead/
The brown family is like the bodyguard family for the MC’s family
Yeah that one. I just forgot the name of it.
The one im reading is called youre all dead if you mess with my brother. The mc is a woman and the romance is nice easy going and refreshing. The big family is literally a shit ton of hot boys who are really skilled physically and they all work for one household.
Lately ive been really into the webtoons about people with big families like the brown family or the villainous family from that shoujo does it have any others? It doesn't have to be centered around them but seeing nice happy families gives me serotonin