Final answer:
J. Bruce Ismay and Lord Pirrie were behind the creation of three infamous ships: RMS Olympic, RMS Titanic, and HMHS Britannic, known as the Olympic class ocean liners.
Step-by-step explanation:
The three ships that were made by J. Bruce Ismay and Lord William Pirrie, both of whom were associated with the White Star Line, were RMS Olympic, RMS Titanic, and HMHS Britannic. These ships were part of a class of liners known as the Olympic class ocean liners, intended to be the most luxurious and largest ships at the time. The most infamous of these is the RMS Titanic, which tragically sank on her maiden voyage in 1912.