Gedmatch is up, but I didn't find much.
You and your aunt both match me with several small segments - one on chromosome 2 which is under 4 cm, but over 1000 snps matches a known cousin of Swiss ancestry.
I have only one Herr match at FTDNA (none at 23&Me) and that match is on chromosome 12 about 76000000 to 87000000 - lots of other small segments, but not the chromosome 2 match.
The surnames attached to the chromosome 2 match are Mori/Moree and Biederman.