Here are the 3 different types of Aulonocara Jacobfriebergi peacock.
http://www.cichlidlovers.com/a_jacob_hongi.htm
and here is a picture of a A. baenschi peacock...looks more like this one then the Jacobfriebergi...
http://www.cichlid-forum.com/articles/a_baenschi.php
and yes all of the cichlids you named are all from Lake Malawi...
Ice blue is a Mbuna, so is the Johanni, and the Electric Yellow...see my sig for all of our cichlids...all of them are Mbuna, except for the 2 female peacocks, and they do just fine...the reason people say not to necessarily put peacock cichlids with other mbunas is they mate alot....and Peacock cichlids, either female or male will cross breed with other cichlids...our female ob peacock has already did that, and we think it might have been the male red zebra....
Man, wish we had a 150 gallon...just make sure to have a lot of hiding places for all the cichlids and no real plants,,,those will be uprooted in no time...since cichlids like to rearrange the substrate alot...and make caves themselves....our red zebra likes to move around alot of substrate for his new homes everytime hubby cleans the tank....so he just leaves the substrate where it is...and the red zebra always defends his home when hubby is cleaning...quite funny to watch...
http://www.cichlidlovers.com/a_jacob_hongi.htm
and here is a picture of a A. baenschi peacock...looks more like this one then the Jacobfriebergi...
http://www.cichlid-forum.com/articles/a_baenschi.php
and yes all of the cichlids you named are all from Lake Malawi...
Ice blue is a Mbuna, so is the Johanni, and the Electric Yellow...see my sig for all of our cichlids...all of them are Mbuna, except for the 2 female peacocks, and they do just fine...the reason people say not to necessarily put peacock cichlids with other mbunas is they mate alot....and Peacock cichlids, either female or male will cross breed with other cichlids...our female ob peacock has already did that, and we think it might have been the male red zebra....
Man, wish we had a 150 gallon...just make sure to have a lot of hiding places for all the cichlids and no real plants,,,those will be uprooted in no time...since cichlids like to rearrange the substrate alot...and make caves themselves....our red zebra likes to move around alot of substrate for his new homes everytime hubby cleans the tank....so he just leaves the substrate where it is...and the red zebra always defends his home when hubby is cleaning...quite funny to watch...