上帝神交了几个他的孩子？

创世记6：2：神的儿子们看见人的女子美貌，就随意挑选，娶来为妻。
创世记6：4：后来神的儿子们和人的女子交合生子，那就是上古英武有名的人。

KJV Gen 6:2: That the sons of God saw the daughters of men that they were fair,and they took them wives of all which they chose.
KJV Gen 6:4: When the sons of God came in unto the daughters of men,and they bare children to them,the same became mighty men which were of old,men of renown.

请教：神早就有不止一个儿子，注意中文为“儿子们”，英文为复数“sons”，为何仍称耶稣为“独生子”？