According to my research, the Tierra Firme flotilla's Concepcion was captained by Don Antonio's son Manuel.
Concepción: Nuestra Señora de Concepción, San Joseph y San Francisco
Captain Don Manuel de Echeverz; Master Diego Pablo Soliar
Manuel & his brother Miguel died in the hurricane, presumably both on this vessel (Miguel could have been on any of them)
Meanwhile, Urca de Lima was also called Concepcion.
REFUERZO
FLOTA - Ubilla
Urca de Lima ("ship of Lima"): Santissima Trinidad y Nuestra Señora de la Concepcion
Dutch cargo frigate, 350 tons, 20 guns, designed with flat bottom for shallow draught