This word means that the father is noble because of the noble status of his son.
The meaning of the phrase "the father is noble because of the son" is basically the same as the mother is noble because of the son. "The mother is noble because of the son" means that the mother is noble because of the son. From "The Legend of Gongyang·Yin Gong Yin", parents hope that their next generation will be stronger than themselves or live a more secure life than themselves, be healthy, happy and materially rich.