Complex sentence: Another unsubstantiated theory suggests it is so-called because of the cripples who used to beg there; the name of the nearby medieval church of St Giles-without-Cripplegate lends credence to this suggestion as Saint Giles is the patron saint of cripples and lepers.
Split into simpler sentences: Another unsubstantiated theory suggests it is named after of the cripples who used to beg there. The name of the nearby medieval church of St Giles-without-Cripplegate lends credence to this suggestion as Saint Giles is the patron saint of cripples and lepers.