Hendrik Lodewijk of Nassau (born 30 November 1639) was the second and youngest son of Frederik Hendrik, Prince of Orange, Stadholder of the Netherlands and Amalia of Solms.
Unfortunately for him, the little tyke didn't even live out the year, but say he had. He'd be twelve when/if Willem II dies as OTL in 1651. He'd still need a regency, but might the Regenten decide that better a six year regency (what was the majority age in the United Provinces) perhaps to reassert their dominance following Willem's monarchic attempts, than for an as yet unborn child? And what happens to Dutch Billy (OTL William III) in this scenario?