Magically speaking, the number 7 is a potent number. The seventh child would be considered to be powerful. The seventh child of the seventh child would be thought of to be considerably powerful. There were feats that often were thought to only a seventh son of a seventh son could handle.
In modern culture, this can be seen in the Harry Potter series. Ginny was the seventh child of the Weasley's and was recognized as a very powerful witch. Also in the Septimus Heap series, Septimus Heap was the seventh son of the seventh son. He was often running into problems because people felt he was the only one that could accomplish certain task for them and would abduct him.
Asher was the seventh son son of Jacob, but The Bible does not mention that he was any different because he was the seventh; neither is any seventh child anything special or different in the Bible.
Some common names given to a seventh child include Seventh Son, Lucky Seven, or Septimus. Additionally, the name could be based on cultural or religious beliefs that associate significance with being the seventh child.
You would be the seventh child of your father who would have to be the seventh child of his family.
I am not aware of any "spiritual significance" to be being born on a certain date, or being a certain age. Obviously in some cases, there might be a "social significance" to it, like those being born on the Fourth of July in America having a minor - and I do mean minor! - bit of panache to that. Or those kids born on Christmas or Halloween. And there are other cases, like someone being the seventh son born on the seventh day of the seventh month in 1977 at 7:17am - stuff like that. Nothing spiritual though, just interesting conversation.
Septimus is a Latin name meaning "seventh" in reference to being the seventh son. It may have been chosen for symbolic or traditional reasons, as some cultures believe that the seventh son possesses special qualities.
Of course not. That is just a silly superstition.
His favorite number is 7. Seven because he is the seventh child born
No, Michael was the seventh child.
No, Michael is the seventh child out of nine.
No. He was the seventh child.
The meaning depends on which folklore you are looking into. Irish folklore believes the seventh child will have healing powers, whereas most others believe the seventh son will become a werewolf, and the seventh daughter a witch.
Yes, the ordinal number seventh (7th) can be an adverb. It can also be an adjective (e.g. seventh child) or a noun (as for the fraction one seventh).*The other adverb form "seventhly" is very seldom seen.
Mohammed only had three sons. His third son, however, was his seventh child. His name was Ibrahim.