Did you go with the default name for the ships you've got, or did you choose your own? If you did, why did you choose the names you have?
Tier 1: USS Agincourt (Named for the Battle of Agincourt in 1415 when the English trounced the French... again.)
Science Vessel: USS John Harrison -- The inventor of the Marine Chronometer that enabled accurate finding of longitude, critical for navigation. He was completely self-trained.
Cruiser: USS Endurance -- Named for the ship eventually crushed by the ice on Sir Ernest Shackleton's failed expedition to cross the Antarctic from 1912-1914. They all survived!
Escort: USS Hotspur -- Named for the fictional ship in Hornblower and the Hotspur. A sloop-of-war with 20 small guns. Fitting for a T2 escort.
Research Vessel: USS Kepler -- Johannes Kepler, astronomer.
Heavy Cruiser: USS Shackleton -- As named above.
Heavy Escort: USS Centurion -- A Roman army rank.
LRSV: USS Sagan -- After Carl Sagan
ECru: USS James Webb -- Another Astronomer.
TE: USS Resolution -- Looked at a list of British Navy ships-of-the-line and chose one I liked the sound of.
DSV: USS Palomar -- After the Palomar telescope.
Recon SV: USS Pathfinder -- Felt right for a Recon ship.
Assault Cruiser: USS Repulse -- Another British Navy vessel.
Star Cruiser: USS Amundsen -- Another Antarctic explorer.
Advanced Escort: USS Trafalgar -- After the huge battle during the Napoleonic Wars.
Fleet Escort: USS Audacious -- Another name I liked the sound of, a British ship.