Usually, 192.168.y.x/24 where y is the birthyear of the oldest person living there at the time of the install (so no renumbering)... I.e. my network is 192.168

Usually, 192.168.y.x/24 where y is the birthyear of the oldest person living there at the time of the install (so no renumbering)... I.e. my network is 192.168.79.0/24, my parents is 192.168.48.0/24, my brothers is 192.168.82.0/24... That lowers the risk of ip-net-conflicts between family members (that sometimes want a vpn between them)