I made a quick search on the telephone directory and found a few people with your last names (Leitao Garcia). May be they are your relatives and you wish to contact them. Here are their adrresses and phone numbers. You have to dial +351 (Country Code) before the numbers.
Garcia, Emília C Leitão Rua Conde D. Henrique 8-r/c-D, 2805-278 ALMADA Phone # 212 764 576
Garcia, Joaquim Leitão R Juventude Lote 214, 2820-312 CHARNECA DA CAPARICA Phone # 212 974 915
Garcia, José A Leitão R Senhora Oliveira Baixo 24, 6230-002 ALCAIDE Phone # 275 547 917