Michael (מיכאל) means "who is like God"
There is no way to write "am" in Hebrew. It just depends on the context of the sentence.I = אני (pronounced ah-NEE)
Baraq (ברק) = lightning Rahm (רם) = loud or highYou might also be thinking of ra'am (רעם) which means "thunder" and is not related to the word rahm.
Barak means 'lightning' in Hebrew. But the President's name is actually not related to this word. It is related to the word Barukh (which means blessed).
If you are asking what the Hebrew word for "he" is in Hebrew, it's hoo (הוא)