He is dead and gone, lady,
He is dead and gone;
At his head a grass-green turf,
At his heels a stone.
Hamlet, Act IV, scene V
Hamnet and Hamlet are in fact the same name, entirely interchangeable in Stratford records in the late sixteenth and early seventeenth centuries.
Steven Greenblatt, ‘The death of Hamnet and the making of Hamlet’, New York Review of Books (21 October 2004)