ors ▁Category : R oman ian ▁military ▁personnel ▁of ▁World ▁War ▁I ▁Category : 2 0 th - century ▁Roman ian ▁po ets <0x0A> </s> ▁Philip ▁R id der ▁( , ▁tr . ▁Fil ipp ▁Fil ipp ov ich ▁R id der ; ▁born ▁in ▁ 1 7 5 9 ▁in ▁Saint ▁Petersburg , ▁Russian ▁Empire ▁- ▁died ▁in ▁ 1 8 3 8 ▁in ▁R iga ) ▁was ▁a ▁Russian ▁expl orer ▁of ▁German ▁descent ▁who ▁discovered ▁polym et all ic ▁or es ▁in ▁north - e astern ▁Kaz akh stan . ▁ ▁A ▁town ▁in ▁that ▁region , ▁R id der , ▁bore ▁Philip ▁R id der ' s ▁name ▁from ▁ 1 7 8 6 ▁to ▁ 1 9 4 1 , ▁when ▁it ▁was ▁changed ▁to ▁Len in og or sk ; ▁however , ▁in ▁ 2 0 0 2 , ▁the ▁name ▁was ▁revert ed ▁to ▁R id der . ▁The ▁town ▁is ▁notable ▁as ▁the ▁eastern ▁termin us ▁of ▁European ▁route ▁E 4 0 . ▁ ▁External ▁links ▁Town ▁of ▁Len in og or sk , ▁Kaz akh stan ▁to ▁reg ain ▁historic ▁name ▁- ▁R id der ▁ ▁Category : 1 7 5 9 ▁birth s ▁Category : 1 8 3 8 ▁death s ▁Category : Pe ople ▁from ▁Saint ▁Petersburg ▁Category : Im per ial ▁Russian ▁people ▁of ▁Balt ic ▁German ▁descent ▁Category : Im per ial ▁Russian ▁expl or ers ▁Category : Ex pl or ers ▁of ▁Central ▁Asia <0x0A> </s> ▁Leg al ▁