There are 2 little horns.
This is actually an argument for there being 2 horns. The wording is different because they are 2 different people.
This is the root word:
[*StrongsHebrew*]
6819
tsâ‛ar tsaw-ar'
A primitive root; to be {small} that {is} (figuratively) ignoble: - be brought {low} little {one}
be small.
Brown-Driver-Briggs' definition of 6819:
(1) to be or grow insignificant, grow small
(1a) (Qal) to ge insignificant
It's employed only three times in the Old Testament:
Job 14:21 His sons come to honour, and he knows it not; and they are brought
low [6819 tsâ‛ar], but he perceives it not of them.
Jeremiah 30:19 And out of them shall proceed thanksgiving and the voice of them that make merry: and I will multiply them, and they shall not be few; I will also glorify them, and they shall not be
small [6819 tsâ‛ar].
Zechariah 13:7 Awake, O sword, against my shepherd, and against the man that is my fellow, says the LORD of hosts: strike the shepherd, and the sheep shall be scattered: and I will turn mine hand upon the
little ones [6819 tsâ‛ar].
4705
mits‛âr mits-awr'
From H6819; petty (in size or number); adverbially a short (time): - little {one} ({while}) small.
4704
mitstse‛îyrâh mits-tseh-ee-raw'
Feminine of H4705; properly littleness; concretely diminutive: - little.
Daniel 8:9 And out of one of them came forth a little
[4704 mitstse‛îyrâh] horn, which waxed exceeding great, toward the south, and toward the east, and toward the pleasant land.
4704 mitstse‛îyrâh is only employed once in the entire Old Testament,
and it's in Daniel 8:9, and its root is the same as the root for 4705, which is 6819.
Daniel 7:8 I considered the horns, and, behold, there came up among them
another little [2192 ze‛êyr zeh-ayr'] horn, before whom there were three of the first horns plucked up by the roots: and, behold, in this horn were eyes like the eyes of man, and a mouth speaking great things.
2192
ze‛êyr zeh-ayr'
(Chaldee); corresponding to
H2191: - little.
2191
ze‛êyr zeh-ayr'
From an unused root (akin (by permutation)
to {H6819}) meaning to dwindle; small: - little.
[2192 ze‛êyr zeh-ayr'] is also only used once in the entire Old Testament:
In Daniel 7:8.
Brown-Driver-Briggs' definition of 2191:
(1) a little
(1a) of quantity
(1b) of time
The 4 beasts in Dan 7 are contemporaneous and future (present). The kingdoms in Dan 2 are contemporaneous - the kingdom of heaven destroys all 4 kingdoms, not just the last one.
Yeah the beast of Revelation 13 = lion, leopard, bear, so all of them.
The rest of your post working out finer details I find very interesting. Not sure if it's correct or partly correct, but it is interesting.