Willem Bakker
- Born: 29 Mar 1874, Rotterdam, , Zuid-Holland, Netherlands
- Marriage (1): Alida Wassenaar on 22 Feb 1899 in Amsterdam, , Noord-Holland, Netherlands
- Died: 24 Mar 1948, Rhenen, , Utrecht, Netherlands at age 73
 Noted events in his life were:
• Occupation: Brouwersknecht.
Willem married Alida Wassenaar, daughter of Philippus Wassenaar and Geertrui van Oosten, on 22 Feb 1899 in Amsterdam, , Noord-Holland, Netherlands. (Alida Wassenaar was born in 1868 in Leiden, , Zuid-Holland, Netherlands and died on 26 Feb 1918 in Leiden, , Zuid-Holland, Netherlands.)
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