I work on a database where column names are prefixed by a character representing the datatype of the column. I quite like this, because it's easy to see at a glance what type of data each column holds.
For example, in the model
City associated with many People, you might have the following relations (this is an example of column names):
id sName (string) sSurname (string) iAge (int) dtDateOfBirth (date) bIsLiving (bit) dSomeDecimalColumn (decimal) hCity (means foreign key reference to the 'City' relation)
id sName dLat dLong etc
The database where I have seen this standard is Yardi. Someone told me this was a standard they had come across before and that it was associated with Bulgaria. But they couldn't be more precise