The gathering brought together intimate family connections despite the absence of more senior royals.
In a surprising move, Andrew Mountbatten-Windsor and Sarah Ferguson attended the ceremony, marking a return to royal events following the removal of their York titles in October.
Princess Eugenie, Beatrice’s younger sister, was also present alongside her husband, Jack Brooksbank.
Speaking about the ceremony, a source told the Daily Mail: “Beatrice has, of course invited her father. But things are not warm between them. However, she’s worried about him.”
The source said: “He’s going through a low ebb with his mental health and she recognises that he dotes on his grandchildren and it would be cruel to deprive him of the chance to attend the christening.”
They added: “Beatrice is determined to keep the focus entirely on her daughter.”