LEMARNA, LABE 20, KEISAR and ZEUS moored at Finkenwerder Vorhafen, seen from Aue-Hauptdeich, Hamburg, 06.08.2017

So we have a Greek god, an emperor, the Elbe river in Czech translation... Does anyone have an idea about Lemarna?

LEMARNA
ENI 04804310
Built by Bodewes BV, Millingen a/d Rijn, Netherlands
Yard no. 431
Year of build: 1946
Flag: Germany (?)
Port of registry: Duisburg (?)
First name: Mathias Stinnes 94
1949 Antwart
1951 Neska 20
1958 Neska 130
1968 Bingen
1975 Regina
1985 Gesiena
1996 Patrona
2006 Harmonie
2016 Lemarna
1.168 tons
L/B/D (m): 79,95 x 9,05 x 2,65

LABE 20
ENI 08451017
Built by Ceske Lodenice, Melnik, Czech Republic
Year of build: 1973
Flag: Czech Republic
Port of registry: Decin
First name: Offen 10
1977 CSPLO MN 11620
1990 Labe 20
1.157 tons
L/B/D (m): 79,92 x 9,20 x 2,40

KEISAR
ENI 04500600
Built by Christof Ruthof Schiffswerft und Maschinenfabrik, Mainz-Kastel, Germany
Yard no. 1392
Year of build: 1955
Flag: Germany
Port of registry: Pattensen
First name: Wetterau
then => Zufriedenheit (meaning "satisfaction/contentment")
1996 Keisar (from Latin "Caesar" => Old Norse "keisari"; Common Germanic "kaisaraz", meaning "emperor")
1.126 tons (1.000 as built)
L/B/D (m): 82,00 (77,00 as built) x 8,18 x 2,51

ZEUS
ENI 04003730
Built by Oberweserwerft, Bodenwerder, Germany
Year of build: 1972
Flag: Germany
Port of registry: Marktheidenfeld
First name: Christian
2015 Zeus
1.909 tons (1.593 as built)
L/B/D (m): 100,00 (80,00 as built) x 9,50 x 2,95