| Descendants of Jacob Cornelisz BLOK and Guurtjr Gerrits KEIJZERName ListNo Surname, <, A, B, C, D, E, F, G, H, I, [J], K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z,[JANSMA-JONGENEEL]
 
 
 Key: S=as a Spouse, C=as a Child, P=as a Parent 
| Names | Born | Died |  
| JANSMA |  |  |  
| AlbertS | born February 19, 1877 | died January 10, 1955 |  
| Harman EeltjesP | born 1845 |  |  
| NeeltjeC | born March 27, 1913 | died November 30, 1984 |  
| Ytje Alberts "Ida"C | born January 18, 1910 | died September 1, 1994 |  
| JONGENEEL |  |  |  
| AldertS | born 1845 |  |  
| ElisabethC | born 1884 |  |  
| JanP |  |  |  
| Johanna CorneliaC | born 1886 |  |  
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