Are the names Stysia and Tsiporah versions of the same name?

I'm trying to align an entry for Stysia/Stisia in Ukrainian records with the name of my great-great-grandmother Tsiporah recorted in family trees.   A researcher just located records which look likely for my Koshkin great-great-grandparents.  

May 23, 1882 List of Jews who settled in Gorodnya district, Chernigov gov.
Record #366
bourgeois Leiba KOSHKIN son of Sholom, 32 years old
His wife Stysia/Stisia-Freidia 31 years old
Their children: Samuil 13, Moisey 8, Zysia 5, Aleksander 1/2 (half a year)
The above is an almost perfect match from my ggf Leib, born in 1850, son of Shalom, who worked as a shokhet and inspector in the US.  I know of two sons, Moshe and Alexander, whose ages align with the above entries.

However, Koshkin family lore says that the mother of Leib's children was called Tsiporah / Frances.  But when Leib emigrated in 1907, the wife who accompanied him was named Stische.  And the name on the gravestone next to Leib's is Chila / Stische.    I've been trying to resolve the name difference for years; the same woman or two different women?  I'd searched the name "Stische" and came up blank for clues about its origins or links to other names. I'd appreciate any information or pointers to helpful sources.  Thank you,

Lee David Jaffe
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Surnames / Towns:  Jaffe / Suchowola, Poland ; Stein (Sztejnsapir) / Bialystok and Rajgrod ; Roterozen / Rajgrod ; Joroff (Jaroff, Zarov) / Chernigov, Ukraine ; Schwartz (Schwarzstein) / Ternivka, Ukraine ;  Weinblatt / Brooklyn, Perth Amboy, NJ ; Koshkin / Snovsk, Ukraine ; Rappoport / ? ; Braun / Wizajny, Suwalki,  Ludwinowski / Wizajny, Suwalki

The name "Tsiporah" is actually an unconventional spelling variant of "Zipporah".

The more traditional variants for "Zipporah" are "Tzipora", "Tziporah", "Tzipporah", and a few others.

Thus, some of the traditional nicknames used are "Zippa", "Tzippa, and a few others.

I'm not 100% sure about the name "Stysia" as this appears (to me) to be an unconventional spelling variant of another name that "might" possibly be "Stasia".

Neither names are the same, but might possibly be a First & Middle name.

Just a thought/opinion... :-))

-- ~Brian D. Kerr, Esq | SSG, U.S. Army (Retired) | SSA, Brigade G1, U.S. Army (Retired) |>>Known Family Surnames (Researching): Dessler, Walk(Valk), Mahler (Maler), Paradisgarten (Paradisegarten), Tomasy (Thomashy), Gluck, Preisz (Priess), Steinhardt (Steinhart), Grossman (Grosman), Sholtz (Shultz), Kaplan, Bloom, Fischer (Fisher), Levy, Baum, Duwidewic, Meisal (Maisel)<<|>>Known Family Locations/Regions (of Surnames): Poland, Ukraine, Russia, Hungary, Lithuania<<|