Interested in your THUMANN search. I have a Philo THUMANN and daughter Jennie May who was born in Sullivan County (upstate NY) about 1881. Also Frederick THUMANN whose daughter Agnes born NYCity about 1883. Have found a number of THUMANNS buried in Delaware County (also upstate NY) including a Philo Flint THUMANN (1861-1935) but I haven't had a chance yet to find any connections. If any of this rings a bell I'd like to hear from you.