Rhein-Lloyd at Mannheim was probably formed in 1936, with Rheinischer Lloyd at Duisburg-Ruhrort later established as a local branch. The Rotterdam concern is identified as N.V. Rijn-Lloyd. Rosanoski questions whether some earlier Mannheim/Rotterdam names were companies or divisions and whether later Lehnkering colours imply a takeover; he does not resolve the relationship.
Keep the explicit scope label independent; no alias or company identity is inferred.