Adelbert Steiner is a very unique name. However we will do our best to investigate it's traditional meanings by splitting up the words and combining the meanings.
Adel - It is a German name that is short for many names beginning with Old Hihg German Adal, which means "noble". Compared with Edel. It also has Jewish and Muslimic origins wich means nobility but also "just", "legally competent". Famous Adels: FFVIII Adel, Simon Adels who is a painter, Adelaide which is a place in Australia
Bert - It's origin is from Germany and it's a male name which means "Bright". Famous Berts: Bert Newton, Sesame Street Bert, Albert Einsten, Engelbert Humperdink, Burt Reynolds.
Steiner - This is his surname and it's origins are from German and Jewish (Ashkenazic) backgrounds. It's an occupational name such as the Smiths, for soem one who works with stone. Quarryman, stonecutter or stonemason, etc. It is a derivation of 'stein'. It is also a topographic name for some oen who lived on stony ground or near a prominent outcrop of rock.
Adelbert Steiner has very strong connections with German and Jewish backgrounds which has links to a noble like background, which is often linked to the path of a Knight or some one with great honour that is bound by the law.