The first point of call for Kent place names is Dr Paul Cullen of Institute for Name-Studies, Uni- versity of Nottingham http://kepn.nottingham.ac.uk/#
Last time I met Paul he was at Nottingham it would appear that he has since moved to Bristol University. He’s often invited to give talks on Kent place names, if you are even remotely interested in the subject he is well worth seeing.
Copy and pasted from the website.
Perhaps '*Trott's cliff'. *Trott is a monothematic masculine personal name. Alternatively the first element may be an OE *trott, cognate with German Trotz 'defiance', referring to the steep scarp of the North Downs.
Elements and their meanings
•pers.n. (Old English) pers.n. Personal name
•clif (Old English) An escarpment, a hill-slope; a river-bank.