Major James Marks has bad Pearl Harbor visit 73 years ago!

My father James was at Pearl Harbor during the bombing many years ago. He later became a Major in the Army and passed the bar to become a lawyer in the late 50's. He was the first Deputy Public Defender in Humboldt County history. Later he went into private practice and had multiple law firms. He fathered eight children, my mother had seven. How many brothers and sisters do I have? Buy lunch for the first correct guess!