My expertise was originally focused on Ashkenazi names (primarily but
not restricted to the Spis Region of Slovakia) in particular findings
on tombstones. About four years ago, I discovered that Sephardic
tombstones had amazingly lots of differences, and in 2015, I presented
my findings in IAJGS in Jerusalem.
One cemetery that I devoted a huge amount of time to was that of the
Sephardic Brotherhood Cemetery in Seattle, Washington. I actually
looked at all the tombstones (on-line) and compiled a spreadsheet of
information for my own research that amounted to 1311 records. True,
these are of 20th century burials and a few in 21st.
So, regarding your question of Malka as a given name, vis-a-vis
Reginas or Reina, I can tell you that not once was Malka used there:
I found Reina (3 instances) in English was Reina in Hebrew; Regina (17
instances) was either Regina, Reina, or both.
As for Malkas in my set of birth records (almost 5900) for Slovakia,
out of identified Hebrew birth names, 38 were named Malka and two
thirds of these had secular names of Amalia or a slight variation,
e.g., Mali or Mili. No Manyas in my records.
Others might have different responses for you.
Beverly Hills, CA
Researching: GOLDMAN, STEINER, LANGER, GLUECKSMAN, STOTTER in various
parts of Galicia, Poland, such as: Nowy Targ, Wachsmund, Dembno,
Lopuszna, Ochotnica, possibly Krakow, who migrated into Kezmarok or
nearby Straszky/Nagy-Eor/Nehre, both now in Slovakia.
GOLDSTEIN in Abaujszina (Sena), Szkaros, Szikso, and Kosice, Slovakia;
KOHN and GOLDSTEIN in Tolcsva, Hungary