Thank you for that KGarrad.
I had already accessed that article and understand the forms of aliases.
The alias seems to have been used for a short period of time, just enough to muddy the waters.
I have not found an instance of a Robins - Whelier marriage. So perhaps the Whelier/Wheeler relates to an occupation eg
"Wheeler: a textile worker who operated a spinning wheel, a mining worker who controlled the pit ponies, or a craftsman who made wheels."
Or was there an employer who his father worked for?
So any ideas or data you can come across would be most helpful.
thanks
Julie