Johan was born about 1818. He passed away in 1883 as listed on his wife's probate record. [1]
"South Africa, Civil Marriage Records, 1840-1973", , FamilySearch (https://www.familysearch.org/ark:/61903/1:1:CL3H-JRZM : Fri Oct 20 10:37:12 UTC 2023), Entry for Johan Frederik Ulrich and Louisa Maria Tebrügge, 17 Aug 1857.
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