#1 Robert Dudley, 1st earl of Leicester (Household Accounts), born 1532-06-24 in England, and died 1588-09-04.
#2 The entomologist Robert Dudley (NMI) was born 1961-9-14 in Edinburgh, Scotland.
#3 The writer on American government is Robert L. Dudley.
#4 The Sir Robert Dudley who sailed to the West Indies is the son of the above earl of Leicester (b. 1574-08-07 in England, d.1649-09-06; buried in San Pancrazio of Florence).