One family line, passing faith down.
Descendants, some from others
The chosen families were descendants, one from the other. Ibn Kathir notes that Isa came from the offspring of Ibrahim. Allah, All-Hearing and All-Knowing, knew who would carry the trust in each generation.
Your kid watches you pray, or watches you skip it. Your niece hears how you talk about your parents. Faith runs down family lines through small, daily things.
What I pass on to my kids is mostly money and opportunities.
The most lasting thing I pass on is my faith, shown more than said.
Let a child in your family see you make dua today, and tell them what you asked for.