I will iy”h look for this sefer tomorrow. Both because the topic interests me and because it can be nogeyah l’maisah.
I think yunger mann made an important point. The fact is that if he is indeed quoting from a sefer of someone who researched these inyonim and spoke at length with Rav Chaim about, there is little anyone can argue about. Who here has spent time learning these inyonim? How can anyone here argue without having spent time learning about these things? Just because it doesn’t sit well with you doesn’t make it wrong. First learn, ask shailos and then come back and comment with proof.
I understand that there is some chochma to sheimos. When I need a name I call up a rav who is known to be aboki in these things and go over them with him. Although he doesn’t discuss it with me I hear him under his breath making some type of cheshbonos before he answers me. So even though a person is given some form of ruach hakodesh when choosing a name it is likely that this ruach hoakodesh is no way comparable to the nevuah that our avos and imahos had when making up names for their own children.