Here are relevant references from the Books where First Spear is mentioned.
I make no pronouncements on these matters, but report them as I find them.
Arrive at your own conclusions.
I wish you well,
I advanced, my spear ready for its cast, my shield ready to be thrown over my body to protect it from the death throes of the thrashing beast should the cast be successful. My life was in my own hands and I was content that this should be so. I would have it no other way.
I smiled to myself. I was First Spear, for there were no others.
Priest-Kings of Gor Book 3 Page 19
I, once a spear of Cos, even a first spear, leader of nine men, with hundreds of others, after the trouble in Ar, scattered, separated from our commands and units, withdrew to Torcadino,
Mariners of Gor Book 30 Page 23
"I was first spear," I said, "of a squad of nine."
Mariners of Gor Book 30 Page 97