New Defender's Study Bible Notes
11:10 generations of Shem. This marks the termination of Shem’s tablet. Apparently Terah (Genesis 11:27) acquired the ancient records at this point, and continued them.
11:10 hundred years old. Evidently Japheth was born one hundred years before the Flood (Genesis 5:32; 7:6). Shem was evidently a few years younger than Japheth (called “the elder” in Genesis 10:21). Ham was still younger. He was called Noah’s “younger son” in Genesis 9:24.
11:10 after the flood. Apparently none of Noah’s sons had children before the Flood, possibly because of the universal violence and their concentration on building the ark.