Hello June, thanks for your enquiry. I certainly haven't come across an Isaac in my own tree. I've had a look at my list of Ager surnames and I've come across a couple of them:
Isaac Ager, son of Isaac and Hannah, baptised 17/11/1801 at Danbury;
Isaac Ager married Georgeanna Reeve of Sandon on 24/3/1832 at Little Baddow
Isaac Ager buried in Birdbrook on 15/5/1828 aged 15 months.
Other surnames connected to my Ager family are: Jackson, Davis Crabb, Emmans and Neal/e. The furthest back I've traced are to a Samuel Agar and Martha Neal/e who were parents to Samuel Ager baptised 8/2/1756 at Great Burstead. I have a basic pedigree chart that I'd be happy to send you.
Best wishes Joanna