Definition of "ungrandfatherly"

She took the little ones to the home of her husband’s father, and he, with somewhat ungrandfatherly promptitude, transplanted them to the infirmary.

1896 June 28, “[Yesterday’s Police Cases.] Bumbledom.”, in Reynolds’s Newspaper, number 2,394, London, page 8, column 2

“A very good letter, isn’t it?” asked Sacheverel, as Burke handed it back to him. “Very. Rather ungrandfatherly, eh?” “Can you imagine any one being the conventional grandfather to Pam? I am hard put to it, very often, to be simply paternal.”

1905, Bettina [Riddle] von Hutten, chapter V, in Pam, New York, N.Y.: A[lbert] L[evi] Burt Company, page 121

But when she took Roy’s return call (collect), she was shocked by the ungrandfatherly voice on the other end.

2011, Neil Lanctot, Campy: The Two Lives of Roy Campanella, Simon & Schuster, page 417

Anne watched as he put an arm around one of the bridesmaids and gave her a decidedly ungrandfatherly squeeze while attempting to look down her dress, then proceeded to hit on the mother of the groom.

2015, Sheila Roberts, A Wedding on Primrose Street, MIRA, page 181