 <translate> Pope Leo in 847 AD was the fourth Leo to have that name and was called Leo IV. Ivan the Terrible was the 4th Tsar to have the name Ivan and was known as Ivan IV Vasilyevich. So, the answer is yes. <yor> Pope Leo ni 847 AD ni Leo kẹrin lati ni orukọ yẹn ati pe a pe ni Leo IV. Ivan the Terrible ni Tsar kẹrin ti o ni orukọ Ivan ati pe a mọ ni Ivan IV Vasilyevich. Nítorí náà, ìdáhùn mi ni pé bẹ́ẹ̀ ni. 