useless trivia: What Word Means: A Low, Contemptible Person?

Questions

Words used to identify people, places or things?

One of a group of peoples inhabiting N Canada, Greenland, Alaska and E Siberia?

An articulated puppet, worked by strings?

Invertebrate with tufted gills living in burrows in muddy sand, often used as bait by fishermen?

The administrative capital of South Africa?