The OSB (luth) Leer Nr. 12134
POTT, Tönjes Simon Dienstknecht zu Leer
* (1854) + 05./08.02.1878 (24,11,22) Leer
There are also other heritagebooks (reformiert, catholic). Look for more POTT in these books.
Perhaps the Pott had friends or other related persons. So they went to Leer (and not another place).
e.g. there was Hendrik Willems Kuiper, Schiffszimmermeister zu Oude Pekela (NL), oo Rikste Gerdes Tromker
or he heard it. Philipp Otto, who had lived in Leer, was at that time an innkeeper in Pekela, Groningen.