Characters in the novel that portrayed the theme of family relationship

Family is a constant theme in the novel, and even the people affected by meeting the children are reminded of their own family. Everything that happens in the novel is driven by family. Joseph escapes from his imprisonment to go and find his wife and children. Ruth is wise beyond her years, acts as a mother to her siblings, and is determined to keep them together. When they meet Kurt Wolff and his wife, the couple wants to adopt the children even though they know they are intent on finding their real parents, the Wolffs identify with Edek and Jan because they had sons themselves.