Family name Irulegui (Irulegui 
) , across the world, is a rare cognomen. The family name Irulegui is characteristic of Uruguay, where it is a rare surname, Argentina, and Spain. Not in comparison with a country's population, it most frequently occurs in Argentina, Spain, and Brazil. Much less frequently, Irulegui is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Irulegui | Brazil, Argentina, United States, Spain, Uruguay |
| josé antonio irulegui Spanish football player/manager, ES (b. 1937) |
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| ignacio irulegui researcher |
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| natalia irulegui Uruguayan writer, UY |
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Ms, Laura, Lelia, Lilia, Lidio, Lucia, Luisa, Jaime, Jairo, Jorge, Julio, Justa, Taryn, Norma, Elias, Elena, Edith, Oscar, Zulma, Zilda, Martin, Martim, Diego, Delia, Ruben, Pedro, Ana, Jon, Aida, Rosa, Rose, Romi, Ruth, Gema, Jose, Joao, Matias, Juan, Omar, Yone, Maria, Sixto, Sonia, Adair, Celso, Clara, Paulo, Pablo, Elma, and Miguel