Dear Maurice, This is what I know about these Thews and most comes from Alan Thew listed in messages on this site.
John THEW,wife Caroline (nee COCKBURN) and 7 children came out to NSW on "Ninevah " in 1876.Had 1 child here.Total 8 children.
Thomas THEW came to Australia before his marriage in 1863 to Sarah TAYLOR. Thomas was a Miner and a Farmer. M1 Thomas Thew and Sarah TAYLOR had 6 children. M2 Elizabeth Mary HORDERN in Canadian Lead,Gulgong on 26/12/1881.Thomas and Elizabeth had 7 children. Total of children 13.
2 William Thew (1836-1918 in Germany).So that is why you can't find him...Germany. I have the children to John and Thomas but no more on William. Hope this helps. Carolyn