The Minnesota Twins MLB symbol has a capital T over a capital C. What does the capital C stand for?

... the team was allowed to keep its original "TC" (for Twin Cities) insignia for its caps. The team's logo shows two men, one in a Minneapolis Millers uniform and one in a St. Paul Saints uniform, shaking hands across the Mississippi River. The "TC" remained on the Twins' caps until 1987, when they adopted their current uniforms. By this time, the team felt it was established enough to put an "M" on its cap without having St. Paul fans think it stood for Minneapolis. The "TC" logo was moved to a sleeve on the jerseys, and occasionally appears as an alternate cap design. Both the "TC" and "Minnie & Paul" logos remain the team's primary insignia.

https://en.wikipedia.org/wiki/Minnesota_Twins

The 'C' stands for Cities. The T/C means Twin Cities (which are Minneapolis and St. Paul), one on each side of the Mississippi River. The M now used stands for the state, Minnesota, and not one of the twin cities, Minneapolis.

https://en.wikipedia.org/wiki/Minneapolis%E2%80%93Saint_Paul#Sports