Romijn's maternal grandfather, Henry Bernard Kuizenga, was a Presbyterian minister and seminary professor. Her mother met Rebecca's father as a teenager while living in the Netherlands on a student exchange program. Her father is a native of Barneveld, the Netherlands, while her mother is an American of Dutch and English ancestry. Rebecca's father, Jaap Romijn, is a custom furniture maker. Her mother, Elizabeth Romijn (née Kuizenga), is a community college instructor of English as a Second Language (ESL) and textbook author.
