What is the oldest written source in this country that mentions this right?

Honduras

The 1982 constitution provides for privacy protections in Article 76. In this text, one is granted “The right to honor, to personal privacy, to family, and to one's dignity” (Constitute Project, “Hungary 1982 rev. 2013").

https://constituteproject.org/constitution/Honduras_2013?lang=en

Privacy Rights · Country sources (all rights) · Years mentioned: 1982, 2013 · Last edited 2022-12-28 · Edit on GitHub