In Noah and the ark did Noah have any siblings?

Answer 1

Noah had his 3 sons and their 3 wives and his wife, but he also had siblings, brothers AND SISTERS (Genesis 5:28-31) , though they are never mentioned by name in The Bible and presumably perished in the flood.

Answer 2

Yes. According to Genesis 5, Methuselah fathered Lamech and he also had other sons and daughters. In turn, Lamech became the father of Noah, and Lamech fathered other sons and daughters.

Therefore not only Noah had grandparents, parents, aunts and uncles, but also brothers and sisters.

Methuselah, a name which means "The waters come when I die", died a natural death just a week before the Flood. Thus, he outlived his own son Lamech by five years, who also died a natural death. Noah's aunts and uncles (the brothers and sisters of Lamech) could have died natural deaths before the Flood, but the chance was that they perished in the Flood itself, as did all of Noah's siblings and cousins.

If all this is true, then this may explain the post-Flood loneliness he might have felt which led to his drunkenness.