Analysis of information sources in references of the Wikipedia article "Angie (song)" in English language version.
While I was in the [Vevey drug] clinic, Anita was down the road having our daughter, Angela. Once I came out of the usual trauma, I had a guitar with me and I wrote Angie in an afternoon, sitting in bed, because I could finally move my fingers and put them in the right place again...I just went, 'Angie, Angie'. It was not about any particular person; it was a name, like 'ohhh, Diana'. I didn't know Angela was going to be called Angela when I wrote 'Angie'. In those days you didn't know what sex the thing was going to be until it popped out.
Jagger, it was rumored, had earlier written 'Angie' (Goats Head Soup, 1973) for David Bowie's wife, Angela.
Rumored to be inspired by Angie Bowie, it was actually inspired by Marianne Faithful after her relationship with Jagger collapsed.