Name a duplicate place name

St Ives, Cornwall and St Ives, Cambridgeshire.

Newport in Wales, Shropshire, Essex and I.O.W

Gillingham in Dorset and Kent but pronounced differently

I’m going to New Quay in West Wales (not Newquay, Cornwall) next weekend,

Lots of Little London’s

Abertridwr Caerphilly…Abertridwr Powys

California, Norfolk

Birmingham, West Midlands UK - Birmingham, Alabama USA

Jerusalem, Lincolnshire
Jerusalem, Israel

Jericho Middle East
Jericho Oxford

Reading Berkshire
Reading Michigan

Newburgh, Fife, Newburgh, Lancashire

Ipswich Queensland Australia
Ipswich Suffolk

Launceston Cornwall.

Launceston.Tasmania.

Boston, New York, Lincoln in Lincolnshire & USA
And there's a Grimsby in Canada.
Caister, Norfolk & Caistor, N.E. Lincolnshire.

On the subject of places starting with new, there is Newtown in Powys, and Newtown on the Isle of Wight - and probably more I don’t know of.

Perth - Scotland

Perth - Australia

Durham - North East England
Durham - North Carolina, USA

Christchurch - Dorset, England
Christchurch - Canterbury, NZ