I'm currently researching the following family, by association...
Johann IFFLAND (b.1792 Eltville, Hessen-Nassau, Preussen) married Elizabeth GOERNER (b.1805 Erbach, , Hessen-Nassau, Preussen) about 1830 Hessen-Nassau, Preussen.
Johann & Elizabeth Iffland, along with their children, Conrad, Eva, Anna Maria & Clara, sailed to NSW, Australia aboard the 'Beulah' in 1849.
Johann IFFLAND was a cousin to Rosalia MAYER (nee SCHUMAKER).
Rosalia (c.1821) arrived in NSW with her husband Eberhardt MAYER also in 1849.
I'm trying to work out the cousin relationship between IFFLAND & SCHUMAKER.
Johann Iffland's parents were:
Nicholaus IFFLAND & Anna Catherina KIEFER/KIEFFERIN
married: 17 JUN 1771 - Katholisch, Eltville, Hessen-Nassau, Preussen.
Sydney, NSW, Australia.