Liza Leeman Blackstock was the sister of James, Tobias, Robert, George, Bella, Anne and Jane. Their parents were William Leeman (1811-1887) and Ann Gillespie, William's parents were George (1782-1818) and Isabella Leeman. George's father was probably Pooler Leeman (named after Captain Robert Pooler killed at the Siege of Derry). William's brother Robert Leeman (1809-1885)was my ancestor.
Hans Garmany was not originally a Leeman. He took the name Leeman from his mother.
The family tree expert is Helen Apperley. I will see her next year in UK. Since 1988 I have lived in Queensland Australia. Helen may be able to work out the differencebetween my records (which she mostly provided) and yours. I have letters from the Hans Garmany Leeman family from the 1980's. I'll try to find them.