Family search has the following all baptised in Rogate to Thomas and Ann Glew
Mary Glew 8 Jun 1783
Thomas Glew 4 Feb 1787
George Glew 6 Sep 1789
Betty Glew 6 March 1791
Frances Glew 29 July 1793
John Glew 18 Sep 1796
James Glew 8 Dec 1799
As well as being listed in Rogate, they are all repeated with only county (Sussex) recorded, an additional one with Sussex only with parents Thomas and Ann is Mely Glew bapt 20 Feb 1785 (female). This would fit nicely between Mary and Thomas.
FindMyPast has burials for Thomas and Ann in Rogate in 1735. Ann on 27 July 1835 and Thomas on 18 Feb 1835. Ages at death gives Ann's birth year as 1752 and Thomas's as 1751.
As first child found was baptised in 1783, either they married when they were 30 or so, or they married in early to mid twenties and there are a few earlier children somewhere, possibly born elsewhere.
Other burials in Rogate which might be connected:
Hannah Glew buried 23 March 1835, estimated birth year 1791. Could be another child of Thomas and Ann not previously found or wife of one of the sons. There is a baptism in Rogate of a Josiah to a Joseph and Hannah in 1828.
James Glue buried 10 March 1801, noted he is son of Thomas and Ann
Henry Charles Groves Glew buried 12 Dec 1834 noted he is infant son of Jemima. This implies he was illegitimate and his name leads to the conclusion his father's surname was Groves.
No sign of a Jemima baptised in Rogate but there is a Jemima baptised to a Henry Glue and Ann in Harting Sussex on 9 Aug 1812. She would be about the right sort of age and Harting only about 4 or 5 miles away. So there might be a connection.