A familiar friend.
An attendant demon.
A servant of the Inquisition.
Familiarly.
Well acquainted; thoroughly versed.
To the familiar idea of outwitting the Cheap Jack he held fast, however. – Jan of the Windmill by Juliana Horatia Ewing
The story of his life is familiar to us all. – Joy in Service; Forgetting, and Pressing Onward; Until the Day Dawn by George Tybout Purves