"Jonathan Oldbuck" is a character made popular by Sir Walter Scott's novel "The Antiquary". If you're looking for synonyms for this name, there are several options depending on your purpose. You could use "Jonathan" or "Oldbuck" alone if you want to reference the character specifically. Alternatively, you could use terms that describe the character's behavior or personality, such as "eccentric", "bookish", or "passionate about history". If you're looking for more creative options, consider using "the antiquarian" or "the collector". Regardless of your choice, each of these options provides a unique way to refer to this literary figure.