The former Ireland international believes comments from the two have not helped matters in regards to Grealish's international future.
That decision was criticised heavily by former Birmingham City and Ireland captain Kenny Cunningham yesterday.His father and agent Kevin Grealish then came out and supported him.
He now has similar support from a former Republic of Ireland international.
“We should be patient and hope he signs for Ireland.
“Remarks made by [Martin] O’Neill and [Roy] Keane have not been helpful to the cause.”
Jack Grealish has made a real impact at Aston Villa since Tim Sherwood took over the managerial reigns at Villa Park.
The 19-year-old has gone from hot prospect to first-team regular, which has seen his international future cast into considerable doubt.
The teenager has played for the Republic of Ireland at youth level but is also eligible for England. He has so far failed to commit his future to any nation on the full senior level. It was revealed by Ireland boss Martin O'Neill this week that Grealish had rejected the latest call-up to the senior squad - as he still needs time to decide who he plays for.