Meng Chuan calmed himself down and thought carefully. He guessed that it was likely Meng An's child. He couldn't think of any other possibilities.
Nice. An'er finally has a child. Meng Chuan was delighted. According to the Meng family's traditions, and basically every family's traditions, only the family's first generation of women would be written into the family genealogy. After the woman married, the children she gave birth to would come under the other family's genealogy.
For example, Meng You's son, Yang Yuan, belonged to the Yang family.
Although the Meng family had many people, for Meng Chuan's bloodline, Meng You had married into another family. Meng An never married or had children. Therefore, his line had come to an end for his family genealogy. It didn't continue.
Now, Meng Chuan's line was continued.