Final answer:
The world's largest Kelpie is commonly referred to as The Loch Ness Monster, a legendary cryptid rumored to inhabit Loch Ness in Scotland.
Step-by-step explanation:
The world's largest Kelpie is also known by the name The Loch Ness Monster. The terms Gargantua and Pantagruel are not associated with the Kelpie but instead are the names of giants in French Renaissance literature written by François Rabelais. The Loch Ness Monster, or Nessie, is a cryptid that is rumored to inhabit Loch Ness in the Scottish Highlands and is often depicted as a large creature with a resemblance to a plesiosaur, which has contributed to its legendary status.