I take back part of my post from above.
It looks like the Census Bureau has changed classifications to include “white” in at least the 1990s and later.
But my original point stands. The Nordyke twins birth certificates use caucasian not white.
OK, so Nordyke’s LFBC says “caucasion” when the form should have said “white” It appears Hawaiian officials were at least inconsistent on this issue.
“Beginning in 1960, the Census Bureau began to use forms similar to the ones in use today, with a single form for an entire household rather than having multiple households included on the form completed by an enumerator. Census forms were mailed to most people, but census-takers picked them up. The data item is called “Color or race” with categories for “White, Negro, American Indian, Japanese, Chinese, Filipino, Hawaiian, Part Hawaiian, Aleut, Eskimo, (etc.)” Note that “black” did not appear on the form.”