A couple more "sightings" of a Peter Aungier
Freemans Journal & Daily Commercial Advertiser 31 May 1898
GOLF - Foxrock Club
The monthly competiotion for the club competition...Mr Peter Aungier was the winner with a net score of 72 (90 less, 18 handicap)
Belfast News Letter 21 November 1881
The Magistracy - the following have been appointed to the Commissioners of the Peace
COUNTY DUBLIN
Peter Aungier, Belcamp, St Doulogh's, Esq
Freeman's etc Jun 22 1882
The clerk reported that he had selected Mr Peter Aungier, J.P of Belcamp, St Doulogh's, County Dublin..... to fill the vacancy in the list of ex-officio guardians, ....
Two mentions (26 May 1881 and 24 May 1883) of him as a member of the "Fitzwilliam Club"
Not a sighting of Peter but a family link
Freeman's etc May 31 1877
DEATHS - Aungier, Mar 29, at the residence of her sister, Mrs Pilsworth, 30 Eccles St, Miss Alice Augnier, third daughter of the late Mark Aungier, of Lays, County Dublin, and sister to the late Peter Augnier.......
None of the tennis references I have found include any biographical date eg age. Perhaps the golf club (founded 1893), tennis club or records of the Dublin Union (if available) might be worth checking out
regards