BT-M42 is a branch on the paternal tree of human kind. It and branches help trace human history from our origin in Africa.
This branch is defined by the Y-Haplotree at FamilyTreeDNA as BT-M42. There, it is the child of the A-V221 branch.
This branch is defined by YFull as BT. There, it is the child of the B branch.
M8968, V187, M8961, M94, M42, PAGES00026, Y8327, M8954, M9278, PF699, M9020, M9282, M9227, M9006, M9379, M9214, M9042, M9322, M9003, V31, M9226, M9228, M9136, PF1126, M8977, M9143, M9188, M8983, M9010, M9126, M9099, M9370, M9043, L1071, PF809, M9354, M9389, M9109, M9125, M9334, M9356, L969, M9095, PF1407, M9267, M9357, M9331, V29, L1062, M9005, M9277, L440, V59, M9114, M9121, M9335, M9175, L970, M9252, M9081, M9046, M9297, M9000, L1061, M299, M9098, M9246, PF1405, M9238, M8999, M9089, L604, M9248, Z12127, Y8311, PF1143, PF601, M9197, M9133, M8971, M9026, M9253, M9209, M9166, M9316, M9239, M9270, M9036, M9019, M8997, M9321, Y8313, M9002, V1219, M9255, M9261, M9291, M9001, M9288, M9146, M9016, M9315, M9365, M9008, V2315, M9193, M9292, L438, M9140, M9174, M9069, M9311, M8960, M9025, L977, M9284, M9045, M9405, PF1027, M9223, M8972, M9359, M9406, M8986, M9346, M9265, Y8489, Z17366, M9295, PF280, M9038, M9037, M9289, M9404, M9137, M9142, M9039, M9328, M9030, Y7547, M9115, Y8321, M9105, M9372, M9187, M9326, M9028, PF918, Y8325, Y8323, M9269, M9034, M8988, M9169, L962, M9124, M9257, M9027, M9305, M9199, PAGES00081, M9148, Y8326, M9017, Z17385, M8970, M9145, M9317, M8967, M9347, M9041, M9182, M9397, Y8320, M9361, M8947, M9283, M9117, PF1247, M9302, M9393, Y8314, M9300, M9009, M9156, M9262, M9057, M9325, M9366, M9196, PF1201, M9398, M9408, M9394, M9375, M9076, M9031, M9327, M9280, M9139, Y8310, M9352, M8976, Y8317, M9240, M9189, M9054, M9129, M11754, M9380, M9245, Y8315, M9128, M9319, M9298, M9376, M9215, M9232, M9173, M9348, Y8318, M9236, M9110, Y8319, M9338, L418, M9373, M9135, L978, M9083, M9116, M9258, M9163, M9032, L1220, M9266, M8979, M9242, M8994, M9293, M11760, M8952, M9399, M8951, M9231, L1060, M9077, M9152, M9068, M8985, M9204, M9103, Y8330, M9066, M9296, M9180, PF917, M9260, Y8306, M8949, M9111, M9224, P97, M9210, M9104, M9220, M9369, M9123, M9191, M9341, M11752, M9094, M9244, M9344, M9176, M9141, M9165, M9235, M9159, M9254, M9263, M9015, Y8329, M8957, Y15547, M9198, PF592, PF1406, M9219, M9303, M9301, M9070, M9138, M9251, Y10871, Y10859, M11781, M9318, Y10888, PAGES00024, M9343, M9410, M9216, M8959, M9102, M9087, Y9417, Y10872, Y8307, M9396, M9237, Y10843, Y10866, Y10873, M9290, Y10880, Y9449, M9286, Y9393, Y10849, M9177, Y10884, M9225, Y10838, M9195, M9011, Y10847, M9312, Y10878, V235, Y10842, Y10851, M9213, M9021, M8955, Y10885, Y10874, M9097, Y10879, K61, M8956, M8993, M9218, M9362, M8958, Y10853, M9382, Y10862, Y10845, Y10841, M9425, Y9452, M9202, Y10875, M9075, M9178, Y10837, M9112, Y9392, M9192, Y10855, Y10852, M9249, V202, M9310, M9287, M9323, Y9421, M9113, M9086, Y10858, M9377, M9172, M9131, M9130, M9203, M9230, M9367, M9234, M9155, M9074, M9004, M9217, M8973, M9390, M9127, M9179, Y9418, M9272, M9306, M9271, M9353, M9417, M9151, M9050, Z17371, M9368, V64, Y10876, Y9394, M9107, Y10867, Y9419, M9374, Y9451, Y9450, PF28, Y11581, M9080, Y10868, Y10839, PF1196, PF632, Y8488, M139, M91, Y30501, M9349, PF161, L957, M8980, M9285, Z17334, Y26760, M9100, M9409, Y10889, M9412, PF1042, M9157, Y10881, PF507, Y8305, M9340, Y10846, M9221, Y6870, M9056, PF175, Y9422, M9065, M9064, Y8316, PAGE65.1, Y8312, M9200, M9421, M9420, M9411, PF1318, M9360, M9329, Y10861, Y9131, Y17291, PF236, Y8308, PF793, M9049, M9304, M9400, Y1547_2, Y1577, Y1546_1, Y1546_2
Peer reviewed sources have not been added for this branch yet. If you know of one I have missed, please link to it in the comments.