Other references to old Hollywood in Singin' in the Rain include Cyd Charisse's hair style, which resembles Louise Brooks' famous bob, and Charisse's gangster boyfriend, who flips a coin like George Raft did in Scarface, Shame of a Nation (1932).
The name Dave is of English origin, and it means Diminutive form of David .
In some cultures, notably the UK but also others, the term 'Christian name' simply means (or used to mean) someone's first name. So David Cameron's Christian name is 'David'. The logic behind this is that babies were typically 'named' at their baptism, which typically occurred shortly after their birth.