Meanings of German names and words

I am looking for any information on the meaning and origin of the following
words and names:
Words-- Nieder and Ober

Names-- Meier
             Koelling
         Brinkoff
         Voelker
         Husemann
         Sahrhagen
         Boerner
         Oevermann
         Wiele
         Luettgert
         Poehls (Poedholt)
         Ellerbrok
         Basse (Bassen)
         Lohmanns
         Kamp
         Blackmeyer
         Tyman (Tieman)
         Berning
         Gresselmeyer
         Siebeking
         Siekmeyer
         
Any info from anyone would be greatly appreciated. Thank you in advance.

Happy Holidays,

Cindy Fregoe
Massena,NY,USA