When you put two things or two people in equal position, you can use 랑 for both. Grammatically it might not be the best way, but it is common in practice. Repeating key elements can often make the sentence sound more lively. 1. I resemble my younger brother = 저는 제 동생이랑 (or 동생과/동생을) 닮았어요. ("I" is the subject). 2. My brother and I resemble each other = 저랑 제 동생이랑 닮았어요 (the two subjects are equals).