Is there any more meaning to Ren's name? In 'Nana', Nana(the singer) has a tattoo of a lotus flower on her arm. 

The lotus flower shares the same Kanji as 'Ren' , Nana's boyfriend. 

Flowers are used quite a bit in symbolism in media, Is there any further significance to this choice of flower aside from the similar names?
As @j__m mentioned, There's probably no more meaning to the name 'Ren' than meets the eye, but reading into it, Lotus flowers can symbolize several things that could be linked to their relationship:


The Egyptians believed the lotus was a symbol of Rebirth, Life and Death



   In the final chapters of the manga, Their relationship is cut short by Ren's sudden death



Buddhism associates the flower with loyalty and faithfullness



   Even though they separate, Ren and Nana return to each other. Ren's lock necklace is a symbol of loyalty also.



Also, Red lotus flowers can be a symbol of love and harmony


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