So, they were baptised.
1Cr 1:15 Lest any should say that I had baptized in mine own name.
Of course. People are only baptised in the name of the Father, the Son, and the Holy Ghost.
1Cr 1:16 And I baptized also the household of Stephanas: besides, I know not whether I baptized any other.
St. Paul did baptise an entire household, he would not have done this if it wasn't important.