All names have times when they are popular and times when they almost disappear. Some goes away but most become popular again in a generation or two. Do not forget there are other countries in the world where some of these names are still alive and well.
Bertram was a tough one to find in the celebrity universe as well, but Bertram Goodhue was a famous 19th-century architect who designed the Cathedral of St. John the Divine in New York City.
All names have times when they are popular and times when they almost disappear. Some goes away but most become popular again in a generation or two. Do not forget there are other countries in the world where some of these names are still alive and well.