Joseph Winterhalder 1786-1852, and his wife Theresia Eggert died in 1864(I'm assuming in Germany, but don't really know for sure) They had 3 children(at least) Carl dob 1820, Joseph dob 1827, and Theodore dob 1833.I think Ted wound up in Santa Cruz Ca (or at least the USA). Theodore(Ted) may have had a son named Albert.
Also: Maria de los Angeles Castro married Joseph Majors in Santa Cruz Ca 1839, . They had 12 children. One of those 12, was Dician Castro Majors who married Theodore Winterhalder in 1859.They were the grandparents of George L Winterhalder, and Albert Winterhalder.
I know that George L Winterhalder settled in the Santa Cruz area, had been born about 1904, and married Dorothy Sinnot. Dorothy Sinnott's parents were Nicholas Sinnot, and Ann Maude Thorpe(or Maude Ann), and her parents were James Thorpe and Margaret O'Connor, who was the sister of Patrick and Matthew O'Connor(brothers born in Canada) who married sisters Mary and Margaret Bradley both born in Co Donegal Ireland, and they were my grandfathers sisters as well.
If anyone thinks any of this connects with whom they are searching for, let me, know and I may be able to help some, at least.