Genesis 5:29

And he called his name Noah, saying, This name shall comfort us concerning our work and toil of our hands, because of the ground which the LORD hath cursed.

1. The name of the son born to Lamech when he was 182 years old was Noah.
2. Apparently, there was an occasion when Lamech declared Noah to be his newborn son's name, and also made comments about the effect the name and/or the child would have on them.
3. Lamech either thought the name, "Noah", would provide he and his family some comfort as they worked hard to farm their land, or he was prophesying about something Noah would do. The latter seems more reasonable to me, for the former would suggest Lamech was a bit nuts.
4. The name, "Noah", perhaps had some meaning relevant to the things he would do in later life.
5. If this is a prophecy about something Noah would do, it was either intended to be extremely obscure or there are missing details. Of course, there is also the possibility that I'm missing the obvious, or that the meaning becomes much clearer when later passages concerning Noah and the ark are examined.
6. The Lord cursed the ground, as noted previously, resulting in the need for people to toil with their hands.