Tulsi : I was initiated with Jayatirtha, Ujjvala, and some others. We sat on the floor with Prabhupada and watched him chant on our beads and do the fire sacrifice. When Prabhupada said, "Your name is Tulsi das," somehow or other I got a shocked look on my face. Prabhupada said, "Is that all right? I said. Oh, yes, Prabhupada!" That was my first personal interaction with Prabhupada. I was a new devotee and I hardly recognized any of the names, but because we'd done tulasi worship I knew the name Tulsi das.
Reference:Memories Anecdotes of a Modern Day Saint - Volume 3 by Siddhanta Dasa