Klaas must have emigrated to Michigan before his marriage in 1881.
There are some possible records at allegroningers.nl for a Klaas Knol emigrating to Noord-Amerika before 1881:
One record is in 1872 for a Klaas Knol aged 35 with a wife and 2 children. Our Klaas was born in 1858, so would be 14 in 1872 - so this is not our Klaas.
There only two other possible records at allegroningers.nl for a Klaas Knol emigrating to Noord-Amerika - both for 1880. Our Klaas is 21-22 years old in 1880.
The first is recorded at Stedum:
Vertrek uit: Stedum
Vertrek naar: Michigan
Religie: Nederlands Hervormd
Emigrant Klaas Knol (boerenknecht), leeftijd 26 jaar
https://www.allegroningers.nl/zoeken-op-naam/deeds/683ea9ab-e274-adc0-e8f3-c47371366de2
The other is from Warffum:
Vertrek uit: Warffum
Vertrek naar: Fulton
Religie: Christelijk Gereformeerd
Emigrant Klaas Knol (boerenknecht), leeftijd 17 jaar
https://www.allegroningers.nl/zoeken-op-naam/deeds/c1827161-f7f4-c8be-ac31-8bacf8e6d48f
Oorzaak: Cancer of the rectum
Plot A-81-1
(1) Er ist verheiratet mit Trijntje Timmer.
Sie haben geheiratet am 24. Mai 1881 in Grand Haven, Ottawa County, Michigan, United States, er war 22 Jahre alt.Quelle 3
(2) Er ist verheiratet mit Janna Jans Smedenga.
Sie haben geheiratet am 9. Januar 1890 in Grand Haven, Ottawa County, Michigan, United States, er war 31 Jahre alt.
Großeltern
Eltern
Geschwister
Kinder
Klaas Knol | ||||||||||||||||||
(1) 1881 | ||||||||||||||||||
Trijntje Timmer | ||||||||||||||||||
(2) 1890 | ||||||||||||||||||
Janna Jans Smedenga | ||||||||||||||||||