alcalde

n. city mayor with judicial powers, judge

Alcalde is the Spanish title of the chief administrator of a town. An alcalde's duties usually include both judicial and administrative functions. The title derives from the Arabic al-qadi, meaning "the judge".This title has been in use in the United States, for example in San Francisco, California (Surocco v. Geary, Supreme Court of California, 3 Cal. 69, 58 Am.Dec. 385, "Geary, at that time Alcalde of San Francisco...").Stephen Johnson Field, later an associate justice of the U.S. Supreme Court, once served as alcalde of the town of Marysville, California.
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n. mayor; governor; provost

(n.)
A magistrate or judge in Spain and in Spanish America, etc.
  

= Lord Mayor.
Ex: This mirrors almost exactly the substance of a speech by Sir John Potter, Lord Mayor of Manchester, when he opened the first public library.
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* alcalde, el = mayor, the.