Where did the name Mariesii came from?

The doublefile viburnum (Viburnum plicatum f. tomentosum 'Mariesii') is a medium-sized deciduous shrub (8 to 16 feet in height) that blooms with white flowers from April to May. The dark green leaves on this dense, multi-stemmed shrub are toothed and oval in shape, turning an attractive burgundy red in autumn