Who is/was the oldest monarch on record?

There are three possible questions here:

Who is the oldest living monarch at present?
Queen Elizabeth b. 21 April 1926, succeeded 1952.
She nudges out King Bhumibol of Thailand by five months.

Who is the longest reining monarch at present?
King Bhumibol of Thailand, succeeded in 1946, has reined for 70 years.

Who was the longest reining monarch ever?
King Subhuza of Swaziland, succeeded in 1899, died upon the throne, 1982. Reined for 82 years, 254 days.

@Espiritus_Corvus What I also wanted to know is who is/was the oldest (greatest in age) reining monarch on record?

This has been difficult. First of all, both of us have been spelling reign wrong. Sorry. We should know better. Second, there seems to be no definitive answer as yet to the oldest person ever to occupy a throne. The oldest person I’ve found so far is Emperor Liu Feng, who was 100 years old (according to the Chinese People’s Republic) when he died in 128 BCE after occupying the throne for 26 years. The year of Liu’s birth is difficult to verify as yet.

While not a record, Rameses II, of Egypt, is certainly up there, having died at 90–91 years of age. Again, not a record, but impressive considering that he lived 3,200 years ago. He also fathered 100 or more children, which makes him the perfect person to name a brand of condom after.

As per the records, Queen Elizabeth II is the oldest monarch. As per stats: Born: April 21, 1926 – Today: 11 May 2016.