Here is what I have so far, if anyone has more to add PLEASE let me know, thank you!

Joseph Jupiter born 1900 in South Dakota
He has 3 siblings that I know of:
John born 1894
Lizzie born 1895
Frank born in 1897, died in WWI in 1920
All three born in South Dakota

I think his mother's name is Annie born 1865 in Russia(?), and his fathers name was also Joseph born 1863 in Austria(?)

We have also been told the Jupiter's came from Bohemia, but don't know if that is true.