To ‘sinder’ in Scots is to part. The ideal number of children in a family was four – ‘twa tae fecht, ane tae sinder and ane tae rin and tell’. The Sinderins in Dundee refers to a parting of the ways or sundering of the roads, one going east along the present Perth Road and the other up the Hawkhill.
Source: – Dundee Names, People and Places’ – David Dorward