CREATE TABLE table_42193 ("Name" TEXT, "Start of Reign" FLOAT, "End of Reign" TEXT, "Birth Name" TEXT, "Title" TEXT)

What is the date of birth of the person who started their reign in 1986?
SELECT "Birth Name" FROM table_42193 WHERE "Start of Reign" = '1986'
SELECT "Birth Name" FROM "table_42193" WHERE "Start of Reign" = '1986'