what does it mean?
bridge of the young men or retainers
Knightsbridge
Knightsbridge was historically known in Saxon and Old English as "Cnihtebricge" (c. 1050); "Knichtebrig" (1235); "Cnichtebrugge" (13th century); and "Knyghtesbrugg" 1364, that is "bridge of the young men or retainers," from Old English "cniht" (genitive case plural –a) and "brycg". 
where does the name persoonia linearis originate from? It is derived from Latin. what does it mean? It is referring to the shape of the leaves. what does the plant look like? It grows as a tall shrub to small tree, occasionally reaching in height but more commonly around tall. The flaky soft bark is dark grey on the surface, while deeper layers are reddish. can you name any scientist who studied it? Henry Cranke Andrews where is he from? Knightsbridge where is this place located? central London, south of Hyde Park any famous buildings in that place? Hyde Park Barracks, The Royalty and Diplomatic Protection Department, The Embassy of Libya, etc are there any famous streets here? UNANSWERABLE where does the name of the scientist's hometown come from? from Old English
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Knightsbridge [SEP] Toponymy
Knightsbridge was historically known in Saxon and Old English as "Cnihtebricge" (c. 1050); "Knichtebrig" (1235); "Cnichtebrugge" (13th century); and "Knyghtesbrugg" 1364, that is "bridge of the young men or retainers," from Old English "cniht" (genitive case plural –a) and "brycg". The original bridge was where one of the old roads to the west crossed the River Westbourne. The allusion may simply be to a place where "cnihtas" congregated: bridges and wells seem always to have been favourite gathering places of young people. However, there is possibly a more specific reference to the important "cnihtengild" (‘guild of "cnihtas"‘) in 11th-century London and to the limits of its jurisdiction (certainly Knightsbridge was one of the limits of the commercial jurisdiction of the City in the 12th century).