I'm not trying to say that the name should be disclosed.
But I want to point out that all the times that we say leiluy nishmas ploni ben ploni, Hashem could have also figured it out.
That is definitely the proper way.
Obviously if those that know his name, feel that it shouldn't be disclosed, I will do the mishnayos Le'iluy Nishmas the person I interacted with on DDF named Jewda, and hope his Neshama has an aliyah.