If you have any further information on Richard (e.g. marriage, names of children, siblings) it would be most helpful. But on the extremely limited information you have provided I have been able to locate a few candidates. Due to variations in spelling along with the Cornish pronunciation of names I included names such as Clift but after checking both 1841 and 1851 Census there is one standout possibility.
In 1841 at St Wenn there is the following family:-
Thomas Cleave age 35, ag lab
Mary Cleave age 30
Richard Cleave age 8
Jane Cleave age 6
Thomas Cleave age 4
William Cleave age 1
Keeping in mind the variations in spelling the above family would be:-
Thomas CLAVE of Roche and Mary TEMBEATH married 30th July 1831 at St Wenn
Richard son of Thomas and Mary CLAVE of Tresayes Lane, labourer baptized 23rd December 1832 at Roche (surname transcribed as CLARE in OPC records)
Jane daughter of Thomas and Mary CLAVE of Tresayes, labourer baptized 28th December 1834 at Roche (surname transcribed as CLARE in OPC records)
Thomas son of Thomas and Mary CLEAVE of Tresayes Lane, labourer baptized 14th April 1837 at Roche (surname transcribed as CLEASE in OPC records)
William son of Thomas and Mary CLEAVE of Trogilders, labourer baptized 24th November 1839 at St Kew
This can only be a starting point but any further information you can supply might help prove whether or not there are links.
CT