Hi tim, the bad news is I have 30 Henry Aindows in my tree. If I narrow it down to when your grandfather may have had his children I can narrow it down to about 8. Don't suppose you know what year your grandfather was born? I do not have a Gerald on my tree but there are so many Aindows I ahve notr traced all of the families.
I ahve my tree on Ancestry and genes - if you have an account with them to check? If not I could send you via a gedcom file but would need your e-mail address.