score:2
The major 'families' are generally equated with language families- so it was theorized that there was Proto Indo European Religion which differentiated into Indo-Iranian, Greek, Celtic and so on. Similarly a Semitic, Ural Altaic, Munda etc family of Religions was believed to exist.
More recently Michael Witzel of Harvard University has published a 'family' type theory of Myths. He thinks myths are very ancient and represent the 'ancestors' of the 'religious families' you refer to. Essentially he makes a sharp distinction between Gondwanan (with a Sub Saharan origin) and Laurentian (Eurasian) families of myths.