Gino (25 Mar 2018)
"What is the name of blasphemy?"

Revelation 13:1 And I stood upon the sand of the sea, and saw a beast rise up out of the sea, having seven heads and ten horns, and upon his horns ten crowns, and upon his heads the name of blasphemy.

What is the name of blasphemy?
It doesn't say the names of blasphemy (plural), but the name of blasphemy (singular).
What is that name?
Why is that particular name blasphemy?
So, even more than the use of that name being blasphemy, but actually it seems that this name itself is blasphemy.
Could it be along the lines of a name which declares one to be God?
The scribes thought that Jesus, who really is God manifest in the flesh, blasphemed:

Mark 2:6 But there were certain of the scribes sitting there, and reasoning in their hearts,
 7 Why doth this man thus speak blasphemies? who can forgive sins but God only?

Doesn't the man of sin actually do that?

II Thessalonians 2:3 Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;
 4 Who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God.

Jesus, who was continually accused of various blasphemies, never blasphemed, though his accusers actually blasphemed him.
The beast, who is not God in the flesh, will be a blasphemer:

Revelation 13:5 And there was given unto him a mouth speaking great things and blasphemies; and power was given unto him to continue forty and two months.
 6 And he opened his mouth in blasphemy against God, to blaspheme his name, and his tabernacle, and them that dwell in heaven.

So, what is the name of blasphemy?
The name of blasphemy is different from names of blasphemy.

Revelation 17:3 So he carried me away in the spirit into the wilderness: and I saw a woman sit upon a scarlet coloured beast, full of names of blasphemy, having seven heads and ten horns.

So, what is the name of blasphemy?