- JOHN HEFFERNAN- Born January 1959 - 6 MORE LONDON PLACE, LONDON, ENGLAND, SE1 2DA 
- GARY HEFFERNAN- Born September 1957 - CASANA, SEAMOUNT ROAD, MALAHIDE, COUNTY DUBLIN, IRELAND, 5 
- STEPHEN HEFFERNAN- Born June 1961 - WELLINGTON HOUSE 273-275 HIGH STREET, LONDON COLNEY, HERTFORDSHIRE, UNITED KINGDOM, AL2 1HA 
- CHRISTOPHER HEFFERNAN- 106-108 STONEBURY AVENUE, COVENTRY, WEST MIDLANDS, UNITED KINGDOM, CV57FW 
- RIONA HEFFERNAN- Born November 1980 - WELLPARK BREWERY 161 DUKE STREET, GLASGOW, G31 1JD 
- MARY HEFFERNAN- 14 RIVER VIEW, FLACKWELL HEATH, BUCKINGHAMSHIRE, HP10 9AT 
- JOSEPH HEFFERNAN- Born August 1958 - 70 CALEDONIA CRESCENT, GOUROCK, RENFREWSHIRE, PA19 1XW 
- PARAIC HEFFERNAN- Born October 1958 - 11 AMBION WAY, HINCKLEY, LEICESTERSHIRE, UNITED KINGDOM, LE10 1JH 
- SOPHIE HEFFERNAN- Born September 1989 - 95 ALMA ROAD, BOURNEMOUTH, UNITED KINGDOM, BH9 1AE 
- MEGAN HEFFERNAN- 20 WHITE STREET, DERBY, ENGLAND, DE22 1HA 
- RACHEL HEFFERNAN- 89 WATKIN ROAD, HEDGE END, SOUTHAMPTON, HAMPSHIRE, ENGLAND, SO30 2TB 
- THIRTY3 DIGITAL LTD- 13375989 - Incorporated on 4 May 2021 
- CODELOOKS LTD- 07665294 - Incorporated on 10 June 2011 
- LUKE ELEC LTDDisolved- 12946487 - Dissolved on 16 May 2023 
- HEFFERNAN MACHINERY SERVICES LIMITED- 04467751 - Incorporated on 24 June 2002 
- HEFFERNAN DENTAL SPECIALISTS LTD- 09351398 - Incorporated on 11 December 2014 
- HEFFERNAN BUILD SOLUTIONS LIMITED- 11279511 - Incorporated on 28 March 2018 
- HEFFERNAN SMALL SYSTEMS LTDDisolved- 10642408 - Dissolved on 16 April 2024 
- HEFFERNAN TALENT PARTNERS LTD- 13520063 - Incorporated on 20 July 2021 
- GILLIAN HEFFERNAN- 12 CENTRAL ACRE, YEOVIL, SOMERSET, BA20 1NU