All records are un-indexed and arranged by parish. So if someone does not appear in the OPR Indexes or Scots Origins they will probably belong to one of these churches. In the 12 years before civil registration, there were more people worshipping outside the Church of Scotland than within it. A denomination, parish, and, for a large town, a address must be specified. Scottish Wills from 1876.
Indexes exist for many localities and time periods.
Register of Deeds . Almost anything can be recorded in this register. Poor Relief Applications . This resource is great for Irish names as it usually gives the names of parents, where they have lived, age, if not the whole birth date, birthplace, etc. Kirk Session Minutes Excellent for looking up the father of an illegitimate child, as the mother is censured and required to name the father.