I'm pretty sure I heard this at Shul: Someone asked R' Zilberstein if he's allowed to publicly praise his living mother, if she doesn't want to be honored. So I think R' Zilvberstein answered that David Hamelech's mother didn't want to be mentioned in Tehillim. So David Hamelech followed her request, and only wrote a remez (hint) to her name.
I think but I don't remember for sure, that he said her name was נצבת Nitzevet. But I may be wrong.
(I don't have contact information for the Shul I davened for that minyan.) Does anyone know where the remez in Tehillim is, and what her name is?
Thank you very much