Gutthi is a Hindi word, which means an entangled mass of string. Mostly when Maanjha used for flying kites is made into a ball randomly and left, it gets stuck, and becomes a 'gutthi'. You could also call it a knot in a way.
Also, problems/mysteries that are difficult to solve are called Gutthi too.
As such the word Gutthi is not used as a name anywhere in the Hindi speaking region, but this features as the unusual name of unusual character performed by Sunil Grover on Comedy Nights with Kapil.