  We report on seven peculiar faint blue stars found in the course of the
Hamburg/ESO survey (HES) which appear to be magnetic white dwarfs (WDs) with
non-hydrogen spectra. We show in particular that four of them (HE 0338-3853, HE
0107-0158, HE 0026-2150, and HE 0003-5701) have He I lines split by magnetic
fields of roughly 20MG, since the \pi components of He I 5876 Angstroem and He
I 4929 Angstroem can be identified unambiguously in their spectra, and the
$\sigma^+$, $\sigma^-$ components can be identified in the spectra of two of
these stars (HE 0338-3853 and HE 0003-5701). Besides GD 229, these are the
first magnetic DB white dwarfs discovered so far.
  In addition, three further WDs with broad, unidentifiable features have been
found: HE 1043-0502, HE 0236-2656, and HE 0330-0002. We argue that in all three
of these stars H I can not be responsible for the broad features, and He I most
probably not for the features in HE 0236-2656 and HE 0330-0002, while it still
remains possible that the broad features of HE 1043-0502 are due to He I.
