Documented evidence
The verified official register entry lists Keller Haan Kathrine as registered in the lawyers’ register with the professional title lawyer at Advokaturbüro Keller Haan in 1969 SG.
Source
Amtliches Anwaltsregister Kanton St.Gallen · https://www.sg.ch/recht/gerichte/anwalts----notarwesen/anwaltsregister---register-der-notare/anwaltsregister---register-der-notare-a-z.html
Context
This entry reflects only the verified state of the source. It does not imply any further legal or personal assessment.