Your great-great grandmother, Celina Nicklaw (b. 29 June 1840 in Canada) married Israel Lafayette which is correct. A person named Josie Sworden may have more information to relay you on Celina and the Lafayette surname.
Celina father was Francois A.X. Jacques (Nicklaw) who also was from the Quebec area of Canada. Francois and family immigrated to Brandon, VT sometime in the mid to late 1860's. Have documentation of Celina attending my gg-grandfathers wedding in Brandon, VT.
Do you go to your family reunions in Starksboro, Vt? Write to me at my e-mail address and I will give you some other information on Celina.