The Student Awards Agency for Scotland (SAAS) keeps a register of scottish educational endowment or trust funds, which has around 400 such trust currently on record.
You can contact the SAAS to request a search, however this requires a form to be filled in and returned, at which point the student will most likley have to contact the organisation themselves anyway. More simply and with greater haste, you browse through the grants available in your particular region of Scotland on this website.