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We present new proper motion and parallax measurements obtained with theEuropean VLBI Network (EVN) at 5$\,$GHz for the three isolated pulsarsB1929+10, B2020+28, and B2021+51. For B1929+10 we combined our data withearlier VLBI measurements and confirm the robustness of the astrometricparameters of this pulsar. For pulsars B2020+28 and B2021+51 our observationsindicate that both stars are almost a factor of two closer to the solar systemthan previously thought, placing them at a distance of $1.39_{-0.06}^{+0.05}$and $1.25_{-0.17}^{+0.14}\,$kpc. Using our new astrometry, we simulated theorbits of all three pulsars in the Galactic potential with the aim to confirmor reject previously proposed birth locations. Our observations ultimately ruleout a claimed binary origin of B1929+10 and the runaway star $\zeta$ Ophiuchiin Upper Scorpius. A putative common binary origin of B2020+28 and B2021+51 inthe Cygnus Superbubble is also very unlikely.

Revisiting the birth locations of pulsars B1929+10, B2020+28,and B2021+51