It's not easy when the same first names are used often in families, and Daniel seems to be one of those names in the Treloar family.
I've found that sometimes it can help if you broaden your search and try to find everything you can about the Treloar family in Wendron and surrounding parishes, and try to put them together that way, like a huge jigsaw puzzle. So looking at descendants, ancestors, siblings etc. Spouses families as well. I find the Cornwall OPC database good for this sort of searching.
It's not foolproof but sometimes you can see naming patterns e.g the eldest son in the family is named after the paternal grandfather, the second son, the maternal grandfather, etc, and the same with the daughters - eldest named after paternal grandmother etc.
Just to complicate matters, when I was searching the Cornwall Online Parish Clerks (OPC) database, I found some extra children of Daniel and Loveday Treloar.
- Elizabeth, baptised at Wendron 9 Nov 1766;
- Mary, baptised at Wendron 7 Aug 1768
- (another) John, baptised at Wendron 15 Sep 1776
Blanch you have but according to the OPC she was baptised at Helston, not Wendron
There are also 3 children of Daniel and Loveday Treloar baptised at Sithney parish (an adjacent parish to Wendron)
- Thomas, baptised at Sithney 26 Aug 1764
- (another) Loveday, baptised at Sithney 8 Apr 1776
- Richard, baptised at Sithney 17 Apr 1778