Thomas Markle has said that his new grandson will serve Britain with “grace, dignity and honour” in reaction to the news of the birth.
Speaking to The Sun, Mr Markle said: “I’m delighted to hear that mother and child are doing well.
“I am proud that my new grandson is born into the British royal family and I am sure that he will grow up to serve the crown and the people of Britain with grace, dignity, and honour.
“God bless the child and I wish him health and happiness, and my congratulations to my lovely daughter Duchess Meghan and Prince Harry, and God save the Queen.”
Mr Markle and the Duchess of Sussex have a difficult relationship following disclosures he has made to the media.
It is unknown whether he will ever meet his grandson.