We know Peter was married as he had a mother-in-law (Luke 4:38). The only other information we have in the Bible about the marriage-state of the apostles is given in Paul’s words in 1 Corinthians 9:5:
“Do we not have the right to take along a believing wife, as do the other apostles and the brothers of the Lord and Cephas?”
This sounds as though most, or perhaps all, of the apostles were married and that they usually took their wives with them when travelling.
The history that we have does suggest that most of the Apostle’s were married. My question is; did any of them have children? If so, did the children travel with them?
The Bible has no information concerning this.