Please, help.
My grandmother Johanne Fredrike Auguste Gumz (Bartz), born in Hafenberg Oct.8th, 1876, Pommern, Germany.
She came to Brazil with her family (arrived in Santos - Sao Paulo - Brazil Nov.30th. 1889, steam-ship Baltimore):
The family:
grandfather - Friedrich Bartz (1818)
mother - Auguste Bartz (1851)
father - Wilhelm Gumz (1849)
brother - August (1875)
brother - Albert (1883)
brother - Carl (1886)
syster - Anna (1888)
I'm trying to find out information about where they come from (places) or any advice to continue this research.