I can see on Public Members Tree - there is a Son, Joseph R TREEN - born 1871 in Cheltenham
here's the christening at Cheltenham Christ Church

23 April 1871

Joseph Ryder TREEN

parents: William CUBITT and Jane TREEN

residence: Hester's Way Farm

occupation of William : Farmer

GRO has the next Son

Alfred Ernest TREEN - mother's maiden name: PIKE

1873, M Quarter in Kings Norton, Volume 06C Page 495

GRO Index has earlier siblings:

William Archer TREEN - 1864 S Quarter in Ross, Volume 06A Page 426 - mother's maiden name: PIKE

Forest of Dean records: Burial at Ross on Wye, 6 April 1865, William Arthur TREEN aged 8 months
residence: Broadmead Terrace ***

Ella Lousie TREEN - 1865 D Quarter in Ross, Volume 06A page 411 - mother's maiden name: PIKE

(from the Tree, William & Jane married at Barnwood)

Here is Ella's christening at Barnwood

April 3 1866

Ellan Louise daughter of William Cubitt and Jane TREEN - residence : Rofs

occupation: Merchant

*** and William Archer TREEN also christened at Barnwood

September 29th 1864

parents: William Cubbit and Jane - residence: Rofs - occupation: Merchant