Who made these camera profiles? Are they made by Sony and built in to the camera that LR Reads?
when E.Chan joined Adobe (or quite soon after that) he posted = http://blogs.adobe.com/jnack/2008/08/the_dng_profile_editor_whats_it_all_about.html
Are these profiles made with data from a specific camera?
for a specific camera model in most cases (in some few cases different camera models might have the same profile data wise)
If so, does LR know which camera, and are the profiles in the list specific for the camera I am using. For example, If I Select "camera landscape", was that profile made specifically for the A7r, or is it just one profile made by Adobe that will be applied to image from any camera?
yes, ACR/LR will use the profile (file) for a specific camera model (different camera models might have the same name displayed in UI - but technically those are different .dcp files), decompile .dcp with dcptool for example