The New Testament speaks of the baptism of "whole
households" which in the normal Greek usage of the time
1 Corinthians 1:16
baptized the household
of Stephanas also ...
He related to us how he had seen (the) angel standing in
his house, saying, 'Send someone to Joppa and summon
Simon, who is called Peter, who will speak words to you
you and all your household will be saved
(Lydia of Thyatira)
and her household had
, she offered us an invitation...