Mag, Maggie, Madga, Alena, Lena.
Famous people named Magdalena:
Painter Magdalena Carmen Frieda Kahlo (a.k.a. Frida Kahlo); models Magdalena Jasek and Magdalena Frackowiak; runner Magdalena Lewy-Boulet.
There are more than ten songs with "Magdalena"in the title, by various artists including Lenny Kravitz, Brandon Flowers, and the Monkees.