Among the boys' names are Liu and Long.

Liu Youlong, Liu Longtian, Liu Chenglong, Liu Hanlong, Liu Longyan, Liu Longtan, Liu Longjiang, Liu Weilong, Liu Longchuan, Liu Longxiang, Liu Yulong, Liu Nanlong, Liu Zhilong, Liu Yuanlong, Liu Ruilong, Liu Haolong, Liu Longxuan, Liu Yuanlong, Liu Penglong, Liu Helong and Liu Yanlong.

If you are satisfied with my answer, please adopt it in time.