Robert Louis Stevenson as my 7th cousin, 4 times removed!  Author of Treasure Island, one of the first books I remember reading.  We cross our MRCA, John Bland (1572-1668), the proposed grandfather of my 8 times great grandfather, Edward Smith (1636-1693) and the furthest documented ancestor I have in the very confusing Smith lineage.  The proposal from We’re Related is even more confusing since they stipulate that the two male children of John Bland have the surname of Smith — these are the next link for both RLS and myself.  Now, usually, the male child does not switch surname.  And rarely would multiple male children change.   So, the reason behind this will have to go on the the dead man’s chest with a yo ho ho, and investigate as time permits.