Luis being a proper name, then "in Luis' class".
there is no name for it in English because Spanish name it!
No
What does Elena think of Luis.
"De tu" translates to "your" in English.
Luis de Unzaga died in 1790.
Fernando De Luis's birth name is Fernando de Luis Molpeceres.
Luis De Jesus's birth name is Luis Angel De Jesus.
The indefinite article "de" in Spanish is analogous to the indefinite article "of" in English.
Luis Vaez De Torres is Spanish.
Luis de Miranda was born in 1971.
Luis de Lossada was born in 1681.
Luis de Lossada died in 1748.