https://en.wikipedia.org/wiki/PostgreSQL#Name https://en.wikipedia.org/wiki/PostgreSQL#Name says the original name was POSTGRES, Postgres is commonly used, and

https://en.wikipedia.org/wiki/PostgreSQL#Name https://en.wikipedia.org/wiki/PostgreSQL#Name says the original name was POSTGRES, Postgres is commonly used, and it was considered to change the official name to Postgres. It does not mention "Postgre" being used at all.