He is married to Jannetje Spaander.
They got married on March 18, 1821 at Wognum, N Holl, Nederland , he was 21 years old.Source 3
Child(ren):
"Netherlands Marriages, 1565-1892," database, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FNZ9-D8X : 12 December 2014), Jan Zijp in entry for Willem Best and Trijntje Zijp, 21 Jun 1860; citing Abbekerk, Noord-Holland, Netherlands; FHL microfilm 113,086.
https://familysearch.org/ark:/61903/1:1:FNZ9-D8X
"Netherlands Marriages, 1565-1892," database, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FN8L-175 : 12 December 2014), Jan Zijp in entry for Willem Best and Trijntje Zijp, 21 Jun 1860; citing Abbekerk; FHL microfilm 113,086.
https://familysearch.org/ark:/61903/1:1:FN8L-175