Leth Family in America

I am keen to discover any members of the Leth family in America who might be related to the Leth family in Australia. My Great Grandfather was George (Jorge) Emil Leth who came to Australia about 1860 and had seven children here. He was born in Tromoy Aust-Agder, Norway on 25.10.1854. Jorg had 2 brothers Hans Leth born 1851 and Jens Marthin Leth born 1852. There was also a sister Juliane Marie born 1856 died 1865. Their father (my G G Grandfather) was Samuel Nicolai (Nicholas) Leth, a ships carpenter born 27.11.1824 Birkeland died 28.4.1864 Stromsboe but the children might have been raised by their mother Maren Gurine Jensdr. Along with Jorg, Hans and Jens might have been under the supervision of their Grandfather Hans Helmer Leth born 1785, a Ships Captain from Birkenes Aust-Agder who married Giertrue or Gjertrud Stiansdr on 18.2.1823 at Tviet Vest-Agder. Hans Helmer Leth was the Captain of the ship from which Jorg escaped in Adelaide Australia aged 16. I don't know the name of the ship but it must have travelled the world several times as Jorg was a cabin boy as young as 9 years old when he first jumped ship in Australia so it is possible his brothers also went to sea with their Grandfater following their fathers death. Hans and Gjertrud had 2 other children: Henriette Hansdr born 1844 and Mathilde ??? Hans father and my G G G G Grandfather was Isaac Leth (Letes) born 1757 and died 1831 in Norway. On 16.1.1781 he married Marte Sophie Willumsen or Villumsen born 1759 died 1822. They had 4 other sons; Nils b 27.6.1782 Frederik b 15.8.1789 who died young, Dienes b 20.4.1791 and the second Frederik born 22.3.1796. They also had 2 girls; Catrine Helmer b 9.8.1783 and Maria Sisilia b 20.12.1794. One of the sons was a Customs Officer in Norway and the other a Ship Broker in Riga. Dienes is also believed to have died young. Catrine Helmer married Consul Morten Kallevag If this family history has any links to your family in America we may be related and I'd be pleased to hear from you.